Diamond grinding cups are designed for the grinding and processing of hard and durable surfaces such as granite, marble, concrete, stone, glass and others. The diameter of the cup is 100mm, the size of the seating ring is 22mm without a metal ring and 16mm with a ring. The thickness of the diamond segment on the cups is 6mm. The cups are suitable for grinders and polishers. One diamond cup is sent in the delivery set.