A circular solid bonded abrasive tool with a central through-hole, made from abrasive materials and binder resins. Angle grinders are a type of abrasive tool widely used due to their versatility and high-speed rotation, capable of coarse, semi-finishing, and finishing grinding on the outer and inner circles, flats, and various profiles of metal or non-metal workpieces, as well as grooving and cutting. There are numerous types of angle grinders. They can be categorized by the abrasive material used, such as common abrasives (corundum and silicon carbide) and natural abrasives (diamond and cubic boron nitride) wheels; by shape, including flat wheels, bevel wheels, cylindrical wheels, cup wheels, and disc wheels; and by binder, such as ceramic, resin, rubber, and metal wheels. The characteristic parameters of wheels include abrasive type, viscosity, hardness, binder, shape, and size. Since wheels often operate at high speeds, they should be subjected to a rotation test (to ensure they won't crack at high working speeds) and a static balance test (to prevent vibration during operation) before use. After some time of use, wheels should be dressed to restore their grinding performance and correct geometric shape.