This pocket tool has 5 necessary tool elements for assembling and disassembling your Glock. It features a 3/32" punch tool, 3/16" hex nut driver, a MagPopper tool, and a bottle opener. The corners of the tool handle are used for centering the frame pins in the frame. The pocket on the side of the tool acts as a third hand and holds the striker assembly while you disassemble it.