Ultimate Arms Gear Meprolight GLOCK G26, G27 FIXED SET TD 3/32 Pin Punch Armorers Tool Package Includes: Meprolight ML10226 O Green/Orange + 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.