Klein 65131 2-in-1 Hex Head Slide Driver 1.5 in.

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