General description This is a 1-inch square drive impact extension bar with a length of 400mm. It is designed for use with impact tools and provides additional reach for fasteners in hard-to-access areas. Technical specifications Length: 400mm Drive Size: 1 inch (square drive) Material: Forged steel Finish: Hardened, tempered, and chemically blacked for corrosion protection Compatibility and accessories Compatible with impact wrenches and drivers with a 1-inch square drive Supplied with a pin and ring for secure attachment Installation Insert the impact extension bar into the impact wrench or driver Secure with the pin and ring provided Usage Use for extending reach when working with impact tools Suitable for automotive, construction, and home improvement tasks involving impact drivers