Resolution: .0005″/0.01mm.
The left jaw can slide up and down to facilitate measurement of stepped sections.
Buttons: on/off, zero, inch/mm.
Automatic power off, move the digital unit to turn on power.
Battery CR2032.
Made of stainless steel.
Optional accessory: data output cable

Insize QMS-A450-U, LARGE SIZE QUICK MEASUREMENT SYSTEMS,
3M 28476, Disc pad Hub, 2-1/2 in 5/8-11 Internal Low Profile, 7000045288
3M 14197, Roloc Disc Pad TP, Medium 2 in 1/4-20 Internal, 7000119311 