Presma 4pc Roll Pin Punch Starter Set Black. - Helps avoid damage caused by only using an impact punch = more accurate & safer - Not hollow Includes common sizes for AR-15s: 1-pc. 1/16in: Bolt Ejector; Charging Handle 1-pc. 5/64in: Gas tube / Gas block 1-pc. 3/32in: Bolt catch; Forward assist retaining pin 1-pc. 1/8in: Trigger Guard Specifications for Presma 4 Piece Roll Pin Punch Starter Set: Manufacturer: Presma Color: Black Fabric/Material: Stainless Steel Gun Make: Universal Gun Model: Universal Condition: New Package Contents: Presma 4 Piece Roll Pin Punch Starter Set What firearm models does the manufacturer say Presma 4 Piece Roll Pin Punch Starter Set is compatible with? The manufacturer says that Presma 4 Piece Roll Pin Punch Starter Set is compatible with UniversalPresma ARTL15: 4pc Roll Pin Punch Starter Set Black