If you need to tighten or loosen stubborn fasteners, the Wright Tool 6901 3/4" Drive Impact Extension is just what you need. Made of alloy steel, this impact socket adapter has a black oxide finish for corrosion resistance. It features a square drive and a 3/4 in. input drive size and 1 in. output drive size. The 4-point impact rated design allows it to handle high torque applications without slipping off the fastener. This Wright Tool 3/4" Drive Impact Extension is an essential tool that will make your work easier and more efficient.