Resolution: .0005″/0.01mm.
Measure hole center distance in the same or offset planes.
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.

3M 27254, Ultra Durable 5 inch Power Sanding Discs, Universal Hole, 60 grit, 7100188460, 5 per pack
Dynabrade 78601 3/8" Dia. x 2" W x 1/8" Center Hole, 180 Grit, 100/pack
Dynabrade 95821 Dynabrade Air Lube 10W/NR, 4oz Bottle
3M 26022, PPS Series 2.0 Adapter, Type S12, 10 mm Male, 1.0 mm Thread, 7100135943 