Klein Tools 65129 2 in 1 Nut Driver, Hex Head Slide Drive, 6 Inch

Unique, patented tip switches from 1/4-Inch size to 5/16-Inch size Magnetic regardless of which driver is selected Twist the thumb nut to lock tip setting Cushion-Grip handle for added torque and comfort U.S. Patent 7,654,175 B2, Weight: 0.5 Pounds, Manufacturer: Klein Tools