MTM originated the 100 round flip-top handgun ammo boxes over 30 years ago. The Case-Gard P-100's are the perfect ammo carrier for the handgunner who wants to spend several hours at the range. Ideal for storing reloads. They have an easy to grip, scuff-resistant textured surface and are stackable. The Snap-Lok latch and full length mechanical hinge are guaranteed for 25 years. Calibers for each box our listed on the bottom of each box. Load label included. For 9mm Luger, 380 ACP, 30 Luger, 32 S&W, 9mm Makarov Max. OAL= 1.22" All MTMCase-Gard's are MADE IN USA in MTM's factory in Dayton Ohio.