Ultimate Arms Gear Meprolight RUGER SR9,SR9C,SR40,SR40C FRONT SIGHT TD 3/32 Pin Punch Armorers Tool Package Includes: Meprolight ML10993F.S + 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.