Resolution .00005″/0.001mm.
Measure pitch diameter of screw threads.
Button function: on/off, set, inch/mm, ABS/INC.
Data output.
LR44 battery, automatic power off.
Non-rotating spindle. Ratchet stop.
Supplied with 60? setting standards (except 0-1″/0-25mm).

Insize 4120-20, METRIC THREAD RING GAGE, GO, M20x2.5, 6928640341519 