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. Single-ended impact socket with 1/2 and 3/8-Inch sizes in one. High-torque, 12-Point design reduces round-off. Use with an impact driver. Engineered for use with impact drivers including Klein's 1/2-Inch Compact Impact Wrench (Cat. Nos. BAT20CW and BAT20CW1). Great for general electrical and construction work. Socket is color coded to quickly identify size.