Klein Tools 2Piece Nut Driver Set Magnetic Nut Drivers 3In Shafts Black/Yellow. This two piece set contains 1/4in and 5/16in hex sizes in 3in shaft lengths. Specifications for Klein Tools 2Piece Magnetic Nut Driver Set: Manufacturer: Klein Tools Color: Black/Yellow Length: 3 in Features of Klein Tools 2Piece Magnetic Nut Driver Set Nut Drivers' hollow shaft design with Rare-Earth magnetic tip facilitates work on bolt applications. Tool Set contains: 1/4in (630-1/4M) and 5/16in (630-5/16M) hex sized nut drivers. Cushion-Grip handle allows for greater torque and comfort and handle end is color coded for easy identification. Internal flanges provide solid twist-resistant shaft anchor. Package Contents: Klein Tools 2Piece Magnetic Nut Driver Set Klein Tools 630M: 2Piece Nut Driver Set Magnetic Nut Drivers 3In Shafts Black/Yellow