Ultimate Arms Gear Meprolight The Mako Group ML11802 Para-Ordnance Tru-Dot Night Sight Set - 12.45, 14.40 And 14.45 LDA Series 3/32 Pin Punch Tool Package Includes: Meprolight ML11802 + 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.