With carbide tipped OD and ID jaws
Rigid one-piece frame of drop-forged steel
Will handle a wide variety of measurements impossible to obtain with regular micrometers
Center channel angle increases capacity
Retractable anvil with indicator for three wire measurements of pitch diameter of precision screws
Starrett 831C Small Hole Gage, .300-.400"/7.6-10.2mm Range *NEW - Open Box Item* Digimatic With carbide tipped OD andItem Description Length: 3 3 8" 85mm Range: . 300 . 400" 7. 6 10. 2mm The Starrett 831 Small Hole Gage is exactly the same as the 829 Series except that the gaging surface is a half ball with a flat bottom. This permits use in even the most shallow holes, slots, and recesses. Ideal for accurately measuring small holes, slots, grooves, and recesses Ideal for accurately measuring small holes, slots, grooves, and recesses Precision Ground Radius on each