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. It can rotate arbitrarily and flexibly within the range of 180 degrees, and a single ratchet wheel is convenient for operation in a 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.