Ultimate Arms Gear Pro Disassembly 3/32 Pin Punch Tool For All Glock Pistols + Universal Gunsmith & Armorer's Bench Block Drive Out Pins and Disassembly Parts Package Includes: Bench Block + Punch Tool Large, 4" Diameter, Useable Surface Will Not Embed Or Mar. Extra size and weight helps keep where you put them and the big face eliminates much of the balancing act when youre driving pins. CANNOT mar even the most highly polished surface. 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.