【2pcs of Z14 is included】This hole punch Z14 is a tool for drilling holes on the bottom of an empty gas cartridge using the principle of the lever. This hole punch Z14 is light-weight and has a ring for easy carry with. You can also use this hole punch Z14 as a block cap. LENGTH：1" / 2.6cm; WEIGHT：0.5oz / 15g (each pc) Usage: A tool for creating holes in the bottom wall of gas cartridges using this hole punch. Features: Surface treated with passivation coating. Equipped with a key ring for convenient portability.