Made in the usa, these floor plates add two additional rounds to glock 9mm magazines, and one additional round to the 40 s&w magazines.They also provide an additional gripping surface for more positive control of the pistol.It is constructed in black, injected-molded polymer.This 2-pack can convert two magazines with no permanent modification required.Caliber: 9mm Luger/40 Smith & Wesson (S&W)Capacity: Adds 2/Adds 1Finish: BlackModel: Floor PlateMaterial: PolymerType: Floor PlateModel Fit: Glock 9, 40Brand Fit: GlockCapacity: Adds 2/Adds 1