Insize Block Level, 12x12"

Sensitivity .00024in/ft (=0.001°)V-groove on bottom and left for shafts (shafts diameter .59~2.76"). With transverse vial. Supplied with adjusting wrench

Sensitivity .0012in/ft (=0.0057°)No need to set zero before useThree V-grooves for shafts (shafts diameter .76~4.56")With longitudinal vial

Sensitivity .00024in/ft (=0.001°)No need to set zero before use. V-groove on bottom for shafts (shafts diameter .76~4.56"). With longitudinal vial.