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, for calipers with c=.630″), data output cable

3M 27313, Ultra Durable 5 inch Power Sanding Discs, Universal Hole, 60 grit, 7100187645, 10 per pack
Standard Abrasives 877012, Unitized Mounted Point, 731 A21 x 1/4 in, 3M 7100074611
Dynabrade 92115 1/2" W x 12" L 220 Grit A/O DynaCut Belt, 50/pack
3M 64324, Foil Tape 3340, Silver, 72 mm x 45.7 m, 3.9 mil, 7010335734 