A vicious and reliable tooth for a rotary harrow with one hole for attachment. Made of high-grade steel grade 45. It has good wear resistance and at the same time is not fragile. When a tooth hits an obstacle, it does not burst, but bends, which makes it possible to further straighten. At the end has a flattened tip in the shape of a scapula. The correct angle of attack makes it possible to carry out work without damaging the culture.