- Upper and lower jaws.
- Measure diameter of grooves inside bores.
- Resolution: .0005"/0.01mm
- Accuracy: ±.0016"
- 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 data cables available.