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Precision Measuring

Precision Measuring

Insize Precision Measuring & Inspection Tools

Authorized Insize distributor  |  Ships direct from Insize  |  Quote reply same day  |  Tool + accessory in one order: save 5%

L. DeWitt McCarter is an authorized Insize distributor. This department carries the Insize 2026 US line — hand measuring tools, gage blocks and thread gages, and inspection equipment from microscopes to hardness and torque testers — each listed under its Insize part number. Have the part number? Type it in the search bar (for example 1108-150) to land on the exact tool. Otherwise, pick a category below.

Hand Measuring Tools

Gages, Standards & Layout

Inspection & Test Equipment

Optical & Video InspectionMicroscopes, magnifiers, profile projectors, vision measuring systems, borescopes and videoscopes.Surface Roughness & Coating ThicknessRoughness testers and probes, roughness specimens, coating thickness gages.Ultrasonic Thickness & Flaw DetectionUltrasonic thickness gages, transducers, couplant and flaw detector.Hardness Testers & Test BlocksLeeb, Rockwell, Brinell, Vickers and Shore testers, durometers and certified test blocks.Force & Material TestingForce gages, spring testers, tension gages, test stands, universal testing machines, metallography.Torque Wrenches & TestersDigital, dial and preset torque wrenches, torque testers, multipliers and heads.Weights & ScalesCalibration weights and weight sets (classes E2, F1, F2, M1), weighing, counting and crane scales.Testing & Specialty InstrumentsSound, light, moisture, temperature and humidity meters, tachometers, multimeters, gloss meters.

Setup, Data & Accessories

Choosing the right tool

If you need to…Start withShop
Check an outside diameter or length at the machineDigital caliper, then an outside micrometer for tighter toleranceCalipers · Micrometers
Measure a bore or internal diameterThree-point internal micrometer, dial bore gage or telescoping gageBore & Inside Measurement
Check runout, flatness or alignmentDial or digital indicator on a magnetic stand; dial test indicator for tight spotsIndicators & Test Indicators · Stands, Holders & Accessories
Accept or reject a threaded partGO and NO GO thread ring or plug gages; 3-wires for pitch diameterThread Gages & Thread Measurement
Calibrate or zero your own toolsGage blocks, setting rings, micrometer setting standards, pin gagesGage Blocks, Pins & Setting Standards
Inspect small features without contactMeasuring microscope, profile projector or vision measuring systemOptical & Video Inspection

Before you order

  • Insize ranges are listed in inch and metric; most digital tools switch between the two.
  • ISO 17025 calibration certificates are available as separate part numbers on the 1108 digital calipers, 1311 dial calipers and 2307 dial indicators (CAL suffix), and on request for those series. Gage blocks, thread gages, setting rings and other standards list a manufacturer inspection certificate where Insize supplies one.
  • Wireless (WL) tools need a receiver; data-output tools need the matching cable. Both are under Data Collection & Wireless.
Need help choosing or a volume price?
Send the Insize part number or the size you need to measure and the quantity — we reply the same day. (210) 494-1997 · [email protected]
Request a Quote
  • Insize 3661-155 precision measuring tool

    Insize 3661-155 – High Precision Non-Rotating Spindle Electronic Micrometer, 125-155MM/4.92-6.1IN

    Insize

    $2,828.90
    Insize 3661-155 – High Precision No
    3661-155
    SKU:
    3661-155
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    1.97 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    3661-155
    Product Family:
    Micrometers
    Supplier Category Code:
    A
    EAN:
    6940561933888
    Package Weight:
    1.97 lb
    Package Length:
    4.85 in
    Package Width:
    16.93 in
    Package Height:
    13.78 in
    Feature 1:
    Resolution 0.01mm/.0005', 0.001mm/0.00005', 0.0005mm/.00002'.
    Feature 2:
    Repeatability 0.5um. Measuring force 5-10N.
    Feature 3:
    Flatness of measuring faces 0.3um. Parallelism of measuring faces 0.5um.
    Feature 4:
    Ratchet stop
    Feature 5:
    Non-rotating spindle, suitable for cylinders.
    Feature 6:
    Quick measurement: one turn of sleeve or ratchet stop makes 2mm spindle feed.
    Feature 7:
    Carbide measuring faces
    $2,828.90
  • Insize 3661-30 precision measuring tool

    Insize 3661-30 – High Precision Non-Rotating Spindle Electronic Micrometer, 0-30MM/0-1.18IN

    Insize

    $1,755.96
    Insize 3661-30 – High Precision Non
    3661-30
    SKU:
    3661-30
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    1.97 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    3661-30
    Product Family:
    Micrometers
    Supplier Category Code:
    A
    EAN:
    6940561933833
    Package Weight:
    1.97 lb
    Package Length:
    1.77 in
    Package Width:
    10.63 in
    Package Height:
    7.09 in
    Feature 1:
    Resolution 0.01mm/.0005', 0.001mm/0.00005', 0.0005mm/.00002'.
    Feature 2:
    Repeatability 0.5um. Measuring force 5-10N.
    Feature 3:
    Flatness of measuring faces 0.3um. Parallelism of measuring faces 0.5um.
    Feature 4:
    Ratchet stop
    Feature 5:
    Non-rotating spindle, suitable for cylinders.
    Feature 6:
    Quick measurement: one turn of sleeve or ratchet stop makes 2mm spindle feed.
    Feature 7:
    Carbide measuring faces
    $1,755.96
  • Insize 3661-55 precision measuring tool

    Insize 3661-55 – High Precision Non-Rotating Spindle Electronic Micrometer, 25-55MM/.98-2.17IN

    Insize

    $2,001.98
    Insize 3661-55 – High Precision Non
    3661-55
    SKU:
    3661-55
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    1.97 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    3661-55
    Product Family:
    Micrometers
    Supplier Category Code:
    A
    EAN:
    6940561933840
    Package Weight:
    1.97 lb
    Package Length:
    1.82 in
    Package Width:
    11.81 in
    Package Height:
    7.09 in
    Feature 1:
    Resolution 0.01mm/.0005', 0.001mm/0.00005', 0.0005mm/.00002'.
    Feature 2:
    Repeatability 0.5um. Measuring force 5-10N.
    Feature 3:
    Flatness of measuring faces 0.3um. Parallelism of measuring faces 0.5um.
    Feature 4:
    Ratchet stop
    Feature 5:
    Non-rotating spindle, suitable for cylinders.
    Feature 6:
    Quick measurement: one turn of sleeve or ratchet stop makes 2mm spindle feed.
    Feature 7:
    Carbide measuring faces
    $2,001.98
  • Insize 3661-80 precision measuring tool

    Insize 3661-80 – High Precision Non-Rotating Spindle Electronic Micrometer

    Insize

    $2,132.83
    Insize 3661-80 – High Precision Non
    3661-80
    SKU:
    3661-80
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    1.97 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    3661-80
    Product Family:
    Micrometers
    Supplier Category Code:
    A
    EAN:
    6940561933857
    Package Weight:
    1.97 lb
    Package Length:
    3.31 in
    Package Width:
    14.17 in
    Package Height:
    9.84 in
    Feature 1:
    Resolution 0.01mm/.0005', 0.001mm/0.00005', 0.0005mm/.00002'.
    Feature 2:
    Repeatability 0.5um. Measuring force 5-10N.
    Feature 3:
    Flatness of measuring faces 0.3um. Parallelism of measuring faces 0.5um.
    Feature 4:
    Ratchet stop
    Feature 5:
    Non-rotating spindle, suitable for cylinders.
    Feature 6:
    Quick measurement: one turn of sleeve or ratchet stop makes 2mm spindle feed.
    Feature 7:
    Carbide measuring faces
    $2,132.83
  • Insize 4001-12E precision measuring tool

    Insize 4001-12E – Cylinder Gage Block, Grade AS-1, 12IN

    Insize

    $1,282.50
    Insize 4001-12E – Cylinder Gage Blo
    4001-12E
    SKU:
    4001-12E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    5.51 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4001-12E
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640358791
    Package Weight:
    5.51 lb
    Package Length:
    14.96 in
    Package Width:
    5.91 in
    Package Height:
    2.95 in
    Feature 1:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 2:
    Meet ASME B89.1.9, grade AS-1.
    Feature 3:
    Can be connected with M6x1 screw and combined to any sizes up to 150'.
    $1,282.50
  • Insize 4001-16E precision measuring tool

    Insize 4001-16E – Cylinder Gage Block, Grade AS-1, 16IN

    Insize

    $1,776.50
    Insize 4001-16E – Cylinder Gage Blo
    4001-16E
    SKU:
    4001-16E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    7.34 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4001-16E
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640358807
    Package Weight:
    7.34 lb
    Package Length:
    18.9 in
    Package Width:
    5.91 in
    Package Height:
    2.95 in
    Feature 1:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 2:
    Meet ASME B89.1.9, grade AS-1.
    Feature 3:
    Can be connected with M6x1 screw and combined to any sizes up to 150'.
    $1,776.50
  • Insize 4001-1E precision measuring tool

    Insize 4001-1E – Cylinder Gage Block, Grade AS-1, 1IN

    Insize

    $139.65
    Insize 4001-1E – Cylinder Gage Bloc
    4001-1E
    SKU:
    4001-1E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    1.42 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4001-1E
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640358746
    Package Weight:
    1.42 lb
    Package Length:
    6.3 in
    Package Width:
    5.51 in
    Package Height:
    2.36 in
    Feature 1:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 2:
    Meet ASME B89.1.9, grade AS-1.
    Feature 3:
    Can be connected with M6x1 screw and combined to any sizes up to 150'.
    $139.65
  • Insize 4001-20E precision measuring tool

    Insize 4001-20E – Cylinder Gage Block, Grade AS-1, 20IN

    Insize

    $2,522.25
    Insize 4001-20E – Cylinder Gage Blo
    4001-20E
    SKU:
    4001-20E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    9.43 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4001-20E
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640358814
    Package Weight:
    9.43 lb
    Package Length:
    22.44 in
    Package Width:
    4.33 in
    Package Height:
    2.36 in
    Feature 1:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 2:
    Meet ASME B89.1.9, grade AS-1.
    Feature 3:
    Can be connected with M6x1 screw and combined to any sizes up to 150'.
    $2,522.25
  • Insize 4001-2E precision measuring tool

    Insize 4001-2E – Cylinder Gage Block, Grade AS-1, 2IN

    Insize

    $184.30
    Insize 4001-2E – Cylinder Gage Bloc
    4001-2E
    SKU:
    4001-2E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    1.66 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4001-2E
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640358753
    Package Weight:
    1.66 lb
    Package Length:
    6.3 in
    Package Width:
    5.51 in
    Package Height:
    2.36 in
    Feature 1:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 2:
    Meet ASME B89.1.9, grade AS-1.
    Feature 3:
    Can be connected with M6x1 screw and combined to any sizes up to 150'.
    $184.30
  • Insize 4001-3E precision measuring tool

    Insize 4001-3E – Cylinder Gage Block, Grade AS-1, 3IN

    Insize

    $235.60
    Insize 4001-3E – Cylinder Gage Bloc
    4001-3E
    SKU:
    4001-3E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    1.97 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4001-3E
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640358760
    Package Weight:
    1.97 lb
    Package Length:
    6.89 in
    Package Width:
    6.1 in
    Package Height:
    2.76 in
    Feature 1:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 2:
    Meet ASME B89.1.9, grade AS-1.
    Feature 3:
    Can be connected with M6x1 screw and combined to any sizes up to 150'.
    $235.60
  • Insize 4001-4E precision measuring tool

    Insize 4001-4E – Cylinder Gage Block, Grade AS-1, 4IN

    Insize

    $389.50
    Insize 4001-4E – Cylinder Gage Bloc
    4001-4E
    SKU:
    4001-4E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    2.21 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4001-4E
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640358777
    Package Weight:
    2.21 lb
    Package Length:
    6.3 in
    Package Width:
    5.51 in
    Package Height:
    2.36 in
    Feature 1:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 2:
    Meet ASME B89.1.9, grade AS-1.
    Feature 3:
    Can be connected with M6x1 screw and combined to any sizes up to 150'.
    $389.50
  • Insize 4001-8E precision measuring tool

    Insize 4001-8E – Cylinder Gage Block, Grade AS-1, 8IN

    Insize

    $679.25
    Insize 4001-8E – Cylinder Gage Bloc
    4001-8E
    SKU:
    4001-8E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    3.81 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4001-8E
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640358784
    Package Weight:
    3.81 lb
    Package Length:
    10.24 in
    Package Width:
    5.51 in
    Package Height:
    2.36 in
    Feature 1:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 2:
    Meet ASME B89.1.9, grade AS-1.
    Feature 3:
    Can be connected with M6x1 screw and combined to any sizes up to 150'.
    $679.25
  • Insize 4001-A precision measuring tool

    Insize 4001-A – Internal Blocks for Cylinder Gage Block

    Insize

    $578.55
    Insize 4001-A – Internal Blocks for
    4001-A
    SKU:
    4001-A
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    1.01 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4001-A
    Product Family:
    Bore and Inside Measurement
    Supplier Category Code:
    A
    EAN:
    6928640316296
    Package Weight:
    1.01 lb
    Package Length:
    5.91 in
    Package Width:
    3.35 in
    Package Height:
    1.18 in
    Feature 1:
    Can be attached to cylinder and rectangular gage blocks.
    Feature 2:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 3:
    Supplied in a matched pair.
    $578.55
  • Insize 4001-B precision measuring tool

    Insize 4001-B – Base for Cylinder Gage Block, Supplied in Pair

    Insize

    $382.85
    Insize 4001-B – Base for Cylinder G
    4001-B
    SKU:
    4001-B
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    13.32 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4001-B
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640379567
    Package Weight:
    13.32 lb
    Package Length:
    13.78 in
    Package Width:
    9.25 in
    Package Height:
    5.12 in
    $382.85
  • Insize 4002-13 precision measuring tool

    Insize 4002-13 – Angle Gage Block Set, 13 Pcs

    Insize

    $6,403.95
    Insize 4002-13 – Angle Gage Block S
    4002-13
    SKU:
    4002-13
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    8.70 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4002-13
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640316364
    Package Weight:
    8.7 lb
    Package Length:
    13.78 in
    Package Width:
    9.84 in
    Package Height:
    1.77 in
    Feature 1:
    Accuracy: ±2'.
    Feature 2:
    To inspect protractor, taper gage, index plate, index head and goniometer, can also be used to set angle.
    Feature 3:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 4:
    Can be combined to any angle with interval 6 seconds after combination (6', 12', 18', ... , 360°).
    $6,403.95
  • Insize 4002-15 precision measuring tool

    Insize 4002-15 – Angle Gage Block Set, 15 Pcs

    Insize

    $7,194.35
    Insize 4002-15 – Angle Gage Block S
    4002-15
    SKU:
    4002-15
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    9.90 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4002-15
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640316371
    Package Weight:
    9.9 lb
    Package Length:
    13.78 in
    Package Width:
    10.83 in
    Package Height:
    1.97 in
    Feature 1:
    Accuracy: ±2'.
    Feature 2:
    To inspect protractor, taper gage, index plate, index head and goniometer, can also be used to set angle.
    Feature 3:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 4:
    Can be combined to any angle with interval 6 seconds after combination (6', 12', 18', ... , 360°).
    $7,194.35
  • Insize 4002-A1 precision measuring tool

    Insize 4002-A1 – Angle Gage Block, 1°

    Insize

    $515.85
    Insize 4002-A1 – Angle Gage Block,
    4002-A1
    SKU:
    4002-A1
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.61 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4002-A1
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640354151
    Package Weight:
    0.61 lb
    Package Length:
    5.91 in
    Package Width:
    3.74 in
    Package Height:
    1.18 in
    Feature 1:
    Accuracy: ±2'.
    Feature 2:
    To inspect protractor, taper gage, index plate, index head and goniometer, can also be used to set angle.
    Feature 3:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 4:
    Can be combined to any angle with interval 6 seconds after combination (6', 12', 18', ... , 360°).
    $515.85
  • Insize 4002-A15 precision measuring tool

    Insize 4002-A15 – Angle Gage Block, 15°

    Insize

    $515.85
    Insize 4002-A15 – Angle Gage Block,
    4002-A15
    SKU:
    4002-A15
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.78 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4002-A15
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640354199
    Package Weight:
    0.78 lb
    Package Length:
    5.91 in
    Package Width:
    3.94 in
    Package Height:
    1.57 in
    Feature 1:
    Accuracy: ±2'.
    Feature 2:
    To inspect protractor, taper gage, index plate, index head and goniometer, can also be used to set angle.
    Feature 3:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 4:
    Can be combined to any angle with interval 6 seconds after combination (6', 12', 18', ... , 360°).
    $515.85
  • Insize 4002-A27 precision measuring tool

    Insize 4002-A27 – Angle Gage Block, 27°

    Insize

    $527.25
    Insize 4002-A27 – Angle Gage Block,
    4002-A27
    SKU:
    4002-A27
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    1.73 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4002-A27
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640354205
    Package Weight:
    1.73 lb
    Package Length:
    6.5 in
    Package Width:
    5.12 in
    Package Height:
    2.56 in
    Feature 1:
    Accuracy: ±2'.
    Feature 2:
    To inspect protractor, taper gage, index plate, index head and goniometer, can also be used to set angle.
    Feature 3:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 4:
    Can be combined to any angle with interval 6 seconds after combination (6', 12', 18', ... , 360°).
    $527.25
  • Insize 4002-A3 precision measuring tool

    Insize 4002-A3 – Angle Gage Block, 3°

    Insize

    $515.85
    Insize 4002-A3 – Angle Gage Block,
    4002-A3
    SKU:
    4002-A3
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.64 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4002-A3
    Product Family:
    Gages and Reference Tools
    Supplier Category Code:
    A
    EAN:
    6928640354168
    Package Weight:
    0.64 lb
    Package Length:
    6.1 in
    Package Width:
    4.72 in
    Package Height:
    1.18 in
    Feature 1:
    Accuracy: ±2'.
    Feature 2:
    To inspect protractor, taper gage, index plate, index head and goniometer, can also be used to set angle.
    Feature 3:
    Made of special alloy steel, hardness HRC64, high stability, wear resistance and easy combination.
    Feature 4:
    Can be combined to any angle with interval 6 seconds after combination (6', 12', 18', ... , 360°).
    $515.85