Resolution .00005″/0.001mm.
Measure the groove diameter of shafts and keyways.
Non-rotating spindle.
Button function: on/off, set, inch/mm, ABS/INC
Data output. LR44 battery, automatic power off.
Ratchet stop.
Supplied with setting standards (except 0-1″/0-25mm).

3M 21543, Scotch-Brite Roloc Clean and Strip XT Pro Extra Cut Disc, TR, 2 in x NH, A XCS, 7100179815, 60/box 
