Ultimate Arms Gear Meprolight The Mako Group ML10662 Beretta M9 & 92 Tru-Dot Night Sight Set - Baretta Cougar 3/32 Pin Punch Tool Package Includes: Meprolight ML10662 + 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.