Resolution .00005″/0.001mm.
IP54 dust/waterproof.
Buttons: on/off, set, inch/mm, ABS/INC.
Data output. LR44 battery, automatic power off.
Carbide measuring faces. Ratchet stop.
Supplied with extension rods.
Setting rings are included (except part no. 3128-12).

Dynabrade 54039 3/8"-24 Female 5/16"-24 Female, 1" Length
Dynabrade 13061 Arbor Assembly 3/8"-24 Female Thread 
