Resolution: .0005″/0.01mm.
Measure depth of small groove and hole, also measure depth of tire tread.
Buttons: on/off, zero, inch/mm.
Supplied with zero set surface.
Automatic power off, move the digital unit to turn on power.
Battery CR2032, data output.
Made of stainless steel.

Insize 1120-500, DIGITAL INSIDE GROOVE CALIPER, 1.57-20"/40-500mm, 6940561961034
Dynabrade 98263 3/8" NPT Male Plug
Dynabrade 95745 1/4" NPT Speed Regulator
3M 19765, Utility Cloth Sheet 314D, 9 in x 11 in P280 J-weight, 7000000353
Standard Abrasives 875711, MD Mini-Brush, 4-1/2 in x 2 in x 5/8-11 FB036 A XCS Medium Density, 7010292437 