Resolution: .0005″/0.01mm.
Measure hole center distance or edge to hole center distance.
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: data output cable.

3M 87449 Silver Depressed Center Grinding Wheel, T27 Quick Change, 9 in x 1/4 in x 5/8-11 Center Hub Thread, 7010409732, 20 per case 
