Bear Metal Design 100rnd Case Gauge for 380ACP. Made in Minnesota out of 6061 Aluminum. 

Fits 100 round MTM 380ACP box for easy transfer.

Gauges are cut to the largest SAAMI allowable dimensions for a loaded round.

Gauge Measures:
 - Oal of round
 - Length of case
 - Diameter of case
 - Diameter of projectile