Qualtool Premium MSH5/16-10 magnetic 5/16 inch hex short nutsetter 10 pack features a short power nutsetter. It has a 5/16 inch broached hex and is 1 5/8 inches long. The drive size is 1/4 inch. For driving hex head self-drilling fasteners and sheet metal screws. All nutsetters are manufactured of industrial quality stainless steel and to exacting specifications resulting in the best possible products for user use.