It is made of chrome vanadium steel, with high hardness, high torque and strong durability. The overall mirror surface is polished, anti-rust and wear-resistant, and has a long service life. Professional appearance design, one opening, one ratchet, extended grip, one for both. Single ratchet, convenient operation and use in small space. It is flexible to use, saving time and effort, and the nut is not loose. Suitable for maintenance of mechanical equipment and automobiles.