Features: The 3 piece grinding head set for 100 angle grinders is perfect for grinding marble, granite, and quartz countertops. These tips ensures that the diamond particles are firmly fixed and not easily detached. The high manganese steel is integrated and has good anti pressure, and anti impact properties. It does not deform or break during use. This product is suitable for workers who need to grind hard and brittle materials such as marble, granite, quartz stone, and various artificial stones. It has an M10threaded interface that can be directly installed on a 100 type angle grinder. Specifications: Material:Metal for 100 type Angle grinder M10threaded interface 6mm Grinding Head:Diameter: 6mm, working depth: 35mm, total length: 58mm; 10mm Grinding Head:Diameter: 10mm, working depth: 25mm, total length: 46mm; 15mm Grinding Head:Diameter: 15mm, working depth: 20mm, total length: 41mm Package Includes: 1set Grinding Head(3pcs) note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.