This extension is fully machined from 6061 Aluminum with a hand polished finish, it is designed to fit Seecamp's .32 magazines. It allows the user of the firearm more area to grip the pistol. It does NOT add any additional capacity to the magazine. Please note that these will only properly fit & function on the "production" Seecamp magazines. A production Seecamp magazine has the Seecamp logo stamped on one side. Larry's very early hand made magazines will not work with these extensions. To install simply replace the floor plate of the magazine assembly with the magazine extension (see exploded view) Specs Weight: 0.16oz. Material: Machined 6061 Aluminum Finish: Hand Polished Aluminum