This grip extension replaces the magazine base plate and internal locking plate.It does not alter the capacity of the magazine but provides better comfort and control by adding approximately 1/2" of gripping surface.It comes two extensions per pack.Caliber: 380 ACPCapacity: Grip ExtensionFinish: BlackModel: Grip ExtensionMaterial: PolymerType: Grip ExtensionModel Fit: P3ATBrand Fit: BerettaCapacity: Grip Extension