Glock Original SP05397 3 Pack of Magazine Insert Polymer Glock 21 21SF 30 + Ultimate Arms Gear 3/32 Punch Armorers Gunsmith Tool Package Includes: Glock SP05397 Pack of 3 + Ultimate Arms Gear Pro Disassembly 3/32 Pin Punch Armorers Gunsmith Tool Fits Glock 21 21SF 30 Including Gen 4. Pack of 3. Replacement part is a factory original from Glock. Manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts which guarantees excellent fit and reliable operation. Ultimate Arms Gear Pro Disassembly 3/32 Punch Armorers Gunsmith Tool Designed to Punch Pins. Features a Polymer Handle and Steel Tip for an Ultra Durable High End Tool. Diameter is 3/32 of an inch or 2.5mm.