Klein Tools 65131 2-in-1 Nut Driver, Hex Head Slide Drive, 1-1/2-Inch
Brand: Klein Tools
Unique, patented tip slides back and forth to switch from a 1/4-Inch to a 5/16-Inch driver
Twist the thumb nut to lock tip setting
Magnetic regardless of which driver is selected
Cushion-grip handle for added torque and comfort
U.S. patent 7,654,175 B2