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 ISR-LS601E, SURFACE ROUGHNESS REFERENCE SPECIMENS, 3.9_in, 6940561934786
Standard Abrasives 875711, MD Mini-Brush, 4-1/2 in x 2 in x 5/8-11 FB036 A XCS Medium Density, 7010292437 