Ultimate Arms Gear Meprolight The Mako Group ML11545 Heckler & Koch Tru-Dot Night Sight Set - HK 45, 45C, P30, And VP9 3/32 Pin Punch Tool Package Includes: Meprolight ML11545 + Ultimate Arms Gear Pro Disassembly 3/32 Pin Punch Armorers Gunsmith Tool Ultimate Arms Gear Tool Diameter is 3/32 of an inch or 2.5mm. Small and compact with enough size and strength to do all that is needed in taking apart pins and putting it together.