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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 4168-14E precision measuring tool

    Insize 4168-14E – Steel Standard Balls, 1/2IN

    Insize

    $24.89
    Insize 4168-14E – Steel Standard Ba
    4168-14E
    SKU:
    4168-14E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.08 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-14E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981520
    Package Weight:
    0.08 lb
    Package Length:
    0.71 in
    Package Width:
    0.71 in
    Package Height:
    0.71 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $24.89
  • Insize 4168-15E precision measuring tool

    Insize 4168-15E – Steel Standard Balls, 17/32IN

    Insize

    $24.99
    Insize 4168-15E – Steel Standard Ba
    4168-15E
    SKU:
    4168-15E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.09 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-15E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981537
    Package Weight:
    0.09 lb
    Package Length:
    0.79 in
    Package Width:
    0.79 in
    Package Height:
    0.79 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $24.99
  • Insize 4168-16E precision measuring tool

    Insize 4168-16E – Steel Standard Balls, 9/16IN

    Insize

    $24.99
    Insize 4168-16E – Steel Standard Ba
    4168-16E
    SKU:
    4168-16E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.09 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-16E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981544
    Package Weight:
    0.09 lb
    Package Length:
    0.79 in
    Package Width:
    0.79 in
    Package Height:
    0.79 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $24.99
  • Insize 4168-17E precision measuring tool

    Insize 4168-17E – Steel Standard Balls, 19/32IN

    Insize

    $24.32
    Insize 4168-17E – Steel Standard Ba
    4168-17E
    SKU:
    4168-17E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.10 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-17E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981551
    Package Weight:
    0.1 lb
    Package Length:
    0.79 in
    Package Width:
    0.79 in
    Package Height:
    0.79 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $24.32
  • Insize 4168-18E precision measuring tool

    Insize 4168-18E – Steel Standard Balls, 5/8IN

    Insize

    $24.51
    Insize 4168-18E – Steel Standard Ba
    4168-18E
    SKU:
    4168-18E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.10 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-18E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981568
    Package Weight:
    0.1 lb
    Package Length:
    0.98 in
    Package Width:
    0.98 in
    Package Height:
    0.98 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $24.51
  • Insize 4168-19E precision measuring tool

    Insize 4168-19E – Steel Standard Balls, 21/32IN

    Insize

    $24.61
    Insize 4168-19E – Steel Standard Ba
    4168-19E
    SKU:
    4168-19E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.11 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-19E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981575
    Package Weight:
    0.11 lb
    Package Length:
    0.98 in
    Package Width:
    0.98 in
    Package Height:
    0.98 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $24.61
  • Insize 4168-1E precision measuring tool

    Insize 4168-1E – Steel Standard Balls, 1/8IN

    Insize

    $12.92
    Insize 4168-1E – Steel Standard Bal
    4168-1E
    SKU:
    4168-1E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.03 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-1E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981391
    Package Weight:
    0.03 lb
    Package Length:
    0.2 in
    Package Width:
    0.2 in
    Package Height:
    0.2 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $12.92
  • Insize 4168-20E precision measuring tool

    Insize 4168-20E – Steel Standard Balls, 11/16IN

    Insize

    $24.61
    Insize 4168-20E – Steel Standard Ba
    4168-20E
    SKU:
    4168-20E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.11 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-20E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981582
    Package Weight:
    0.11 lb
    Package Length:
    0.98 in
    Package Width:
    0.98 in
    Package Height:
    0.98 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $24.61
  • Insize 4168-21E precision measuring tool

    Insize 4168-21E – Steel Standard Balls, 23/32IN

    Insize

    $24.70
    Insize 4168-21E – Steel Standard Ba
    4168-21E
    SKU:
    4168-21E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.11 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-21E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981599
    Package Weight:
    0.11 lb
    Package Length:
    0.98 in
    Package Width:
    0.98 in
    Package Height:
    0.98 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $24.70
  • Insize 4168-22E precision measuring tool

    Insize 4168-22E – Steel Standard Balls, 3/4IN

    Insize

    $24.80
    Insize 4168-22E – Steel Standard Ba
    4168-22E
    SKU:
    4168-22E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.12 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-22E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981605
    Package Weight:
    0.12 lb
    Package Length:
    1.1 in
    Package Width:
    1.1 in
    Package Height:
    1.1 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $24.80
  • Insize 4168-23E precision measuring tool

    Insize 4168-23E – Steel Standard Balls, 13/16IN

    Insize

    $27.17
    Insize 4168-23E – Steel Standard Ba
    4168-23E
    SKU:
    4168-23E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.12 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-23E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981612
    Package Weight:
    0.12 lb
    Package Length:
    1.1 in
    Package Width:
    1.1 in
    Package Height:
    1.1 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $27.17
  • Insize 4168-24E precision measuring tool

    Insize 4168-24E – Steel Standard Balls, 7/8IN

    Insize

    $28.03
    Insize 4168-24E – Steel Standard Ba
    4168-24E
    SKU:
    4168-24E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.13 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-24E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981629
    Package Weight:
    0.13 lb
    Package Length:
    1.1 in
    Package Width:
    1.1 in
    Package Height:
    1.1 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $28.03
  • Insize 4168-25E precision measuring tool

    Insize 4168-25E – Steel Standard Balls, 15/16IN

    Insize

    $28.12
    Insize 4168-25E – Steel Standard Ba
    4168-25E
    SKU:
    4168-25E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.13 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-25E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981636
    Package Weight:
    0.13 lb
    Package Length:
    1.18 in
    Package Width:
    1.18 in
    Package Height:
    1.18 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $28.12
  • Insize 4168-26E precision measuring tool

    Insize 4168-26E – Steel Standard Balls, 1IN

    Insize

    $29.74
    Insize 4168-26E – Steel Standard Ba
    4168-26E
    SKU:
    4168-26E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.14 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-26E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981643
    Package Weight:
    0.14 lb
    Package Length:
    1.57 in
    Package Width:
    1.57 in
    Package Height:
    1.57 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $29.74
  • Insize 4168-2E precision measuring tool

    Insize 4168-2E – Steel Standard Balls, 9/64IN

    Insize

    $13.02
    Insize 4168-2E – Steel Standard Bal
    4168-2E
    SKU:
    4168-2E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.03 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-2E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981407
    Package Weight:
    0.03 lb
    Package Length:
    0.2 in
    Package Width:
    0.2 in
    Package Height:
    0.2 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $13.02
  • Insize 4168-3E precision measuring tool

    Insize 4168-3E – Steel Standard Balls, 5/32IN

    Insize

    $14.73
    Insize 4168-3E – Steel Standard Bal
    4168-3E
    SKU:
    4168-3E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.04 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-3E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981414
    Package Weight:
    0.04 lb
    Package Length:
    0.2 in
    Package Width:
    0.2 in
    Package Height:
    0.2 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $14.73
  • Insize 4168-4E precision measuring tool

    Insize 4168-4E – Steel Standard Balls, 3/16IN

    Insize

    $14.82
    Insize 4168-4E – Steel Standard Bal
    4168-4E
    SKU:
    4168-4E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.04 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-4E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981421
    Package Weight:
    0.04 lb
    Package Length:
    0.31 in
    Package Width:
    0.31 in
    Package Height:
    0.31 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $14.82
  • Insize 4168-5E precision measuring tool

    Insize 4168-5E – Steel Standard Balls, 7/32IN

    Insize

    $14.92
    Insize 4168-5E – Steel Standard Bal
    4168-5E
    SKU:
    4168-5E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.04 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-5E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981438
    Package Weight:
    0.04 lb
    Package Length:
    0.31 in
    Package Width:
    0.31 in
    Package Height:
    0.31 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $14.92
  • Insize 4168-6E precision measuring tool

    Insize 4168-6E – Steel Standard Balls, 1/4IN

    Insize

    $15.01
    Insize 4168-6E – Steel Standard Bal
    4168-6E
    SKU:
    4168-6E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.05 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-6E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981445
    Package Weight:
    0.05 lb
    Package Length:
    0.39 in
    Package Width:
    0.39 in
    Package Height:
    0.39 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $15.01
  • Insize 4168-7E precision measuring tool

    Insize 4168-7E – Steel Standard Balls, 9/32IN

    Insize

    $16.53
    Insize 4168-7E – Steel Standard Bal
    4168-7E
    SKU:
    4168-7E
    Availability:
    Ships direct from Insize. Most items in stock; we confirm your ship date by email after you order.
    Weight:
    0.05 LBS
    Brand:
    Insize
    Manufacturer Part Number:
    4168-7E
    Product Family:
    Testing and Specialty Instruments
    Supplier Category Code:
    A
    EAN:
    6940561981452
    Package Weight:
    0.05 lb
    Package Length:
    0.39 in
    Package Width:
    0.39 in
    Package Height:
    0.39 in
    Feature 1:
    To measure angle and diameter of taper holes
    Feature 2:
    Material: tool steel
    Feature 3:
    Hardness: HRC63
    Feature 4:
    Diameter accuracy:±.00012“
    Feature 5:
    Roundness .00004'
    Feature 6:
    Supplied with manufacturer inspection certificate.
    $16.53