Almost entirely brass, the brass clip fits securely on a coat button holding this "pick & whisk" ready for use. The bristles are fine springy brass wire, captured in a brass ferrule, looped in a brass chain. The military musket size steel vent pick may require sharpening to enter a rifle flash hole. We recommend filing or grinding three flats on the pick's end, to ream away any hard residue that may foul your breech.