A replacement 1/2" Drive Power / Breaker / Knuckle Bar head suitable for most bars. Manufactured from chrome vanadium steel for strength and durability. Black phosphate finish resists rust and corrosion. Suitable for all 1/2" drive power bars no matter what the make and model. Suitable for those with an end on the handle. Includes fixing bolt & spring washer. Total gap between the jaws 14mm 1/2" square drive.