Klein Tools 66011 2-in-1 Impact Socket, 12-Point, 1/2 and 3/8-Inch

Single-ended impact socket with hands-free adjustment between 1/2-Inch and 3/8-Inch hex sizes. Deep socket with a 1/2-Inch drive is great for use in electrical and construction work. The high-torque, 12-Point design is easier to position and works with square fasteners.