Resolution: .0005″/0.01mm.
Measure groove diameter.
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

Insize HDT-A510-U, AUTOMATIC DIGITAL SUPERFICIAL ROCKWELL HARDNESS TESTER, 6940561976632
Standard Abrasives 710725, A/O Full Taper Cartridge Roll, 1/2 in x 1-1/2 in x 1/8 in 36, 7100085875
Standard Abrasives 877059, Unitized Mounted Point, 732 A3 x 1/4 in, 3M 7010310345 