Resolution: .0005″/0.01mm.
Measure diameter of grooves inside bores.
Buttons: on/off, set, inch/mm, preset (+, -).
Automatic power off, move the digital unit to turn on power.
Battery CR2032. Data output.
Made of stainless steel.
Optional accessory: depth stop (part no. 6143), data output cable

Dynabrade 56106 5" Dia. Non-Vacuum Disc Pad, Vinyl-Face
Norton 66623303912 - 2" Dia. XCS Grit Aluminum Oxide Type III, Bear-Tex Non-Woven Quick-Change Disc, 25 Each 
