The High-torque Klein Tools 2-in-1 Impact Socket, 12-Point, 1/2 and 3/8-Inch is a single-ended impact socket with hands-free adjustment between socket sizes have two coaxial spring-loaded 1/2-Inch and 3/8-Inch hex socket sizes in one tool and 12-Point design is easier to position and works with square fasteners.
UPC 0-92644-65053-6