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

Dynabrade 55242 Vane Set (4pk)
3M 27252, Ultra Durable 5 inch Power Sanding Discs, Universal Hole, 220 grit, 7100188458, 10 per pack
Dynabrade 14230 Rubber Drive Wheel
Dynabrade 11399 Type 27 Wheel Mounting Adapter Kit 