Klein 2-in-1 Impact Socket, 12-Point, 7/8 and 11/16-Inch 66014Single ended impact socket with hands free adjustment between socket sizes Two coaxial spring loaded 7 8 Inch and 11 16 Inch hex socket sizes in one tool Deep socket with a 1 2 Inch drive works great for hardware installation and removal High torque, 12 Point design is easier to position and works with square fasteners Cross hole design to prevent unintentional separation of adapter and socket Engineered for use with impact drivers including Klein's 1