The Hornady Dial Caliper is perfect for a reloader looking for a tool to precisely measure case and bullet length, inside and outside diameters, primer pocket depth, overall cartridge length, and more. Comes packaged in a protective plastic case included.

- Knob at bottom of dial face can be loosened to allow face to turn and thereby 'zero' the caliper.
- The screw should then be tightened to keep the setting.
- Knob at top of caliper can be tightened to lock down a measurement.