Teng Tools 3/4" Deep Impact Socket DINTeng Tools 3 4" deep impact sockets are designed to DIN standards and manufactured from chrome molybdenum steel for strength and durability. The extended depth makes them ideal for accessing recessed fasteners in heavy duty applications. Key features: 3 4" square drive with retaining ring groove and retaining pin hole for secure use with power tools. Made from chrome molybdenum steel for maximum strength. Black phosphate finish for corrosion