Qualtool Premium MSHL5/16-6 Magnetic 5/16-Inch Hex Extra Long Nutsetter Features extra long power drive nutsetter 5/16 inch broached hex 6 Inch long Drives hex head self-drilling fasteners and sheet metal screws Manufactured from the best grade industrial tool steel available and heat-treated to the optimal "Rockwell C" hardness for that steel, resulting in the best possible products for your use.