Stanley Proto J155/8S2 Proto 5/8-Inch by 3/16-Inch Long Aligning Punch Application: to align holes in two or more pieces of metal through which a bolt or screw is to be inserted One-piece design for strength and durability Reverse taper to help prevent binding Made from S2 steel and specially heat-treated for greater strength and durability Modified parabolic striking end to help reduce mushrooming and chipping