Magnetic Nut Driver Set (1/4", 5/16", 3/8", 7/16", 1/2") - IMPACT READY(R) Equip yourself with the Dewalt DW2235IR Nutsetter Set for the job. This magnetic nut driver can withstand up to 2000 in-lb of torque. It comes with 5 magnetic bit holders, each of which has a hex shank and can accommodate bits up to 1/4" in size. 5 Pc.