Irwin Tools 1837556 Impact Performance Series Nut Setter, 1/4" x 4" This nutsetter utilizes impact drivers for durability and long life Nutsetter has a lobular design to drive the fastener on the side for less stripping and longer life Rare Earth magnets provide a strong hold to grip fasteners securely A black oxide finish on the nutsetter provides corrosion-resistance to increase the life of the bit Quick-change shank is designed to work with impact drivers and reduces slipping in standard drill chucks