Vermont American 15118 3 Piece 1/4-Inch Hex Shank Magnetic Nut Setter Set with 1/4-Inch, 5/16-Inch and 3/8-Inch Nutsetters Ideal for fast, easy driving of nuts, bolts and hex head screws. Rugged single-piece construction provides long life under constant use. The precision formed tip ensures a proper fit Magnetic shaft holds fastener securely Universal 1/4" hex shank with power groove