Specifications: Applicable Equipment: Angle Grinder. Material: Diamond, Carbide. Overall length: 60mm. Useful deep: about 40mm. Shank Diameter: M14. Hole Saw Diameters: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 35mm, 38mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 68mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm. 100% brand new and high quality. Small incision resistance,feature drilling stably, fast speed, not breaking the border. Opening neat, smooth, no broken edges, no tremor phenomenon, chip Easily. Mainly used for drilling marble, tile, limestone, brick, concrete, slate mable, stone processing, granite light stone and other hard material. Note: 1. Clean the surface and please make sure that water or coolant must be added to keep wet during drilling. 2. Start drilling with a 45 degrees angle to the surface slowly. 3. Drill at low speed and adjust the drilling angle to vertical position when the hole appears. Package Included: 1 x Diamond Brazed Drill Bit for Angle Grinder.