Specifications: Applicable Equipment: Angle Grinder. Material: Diamond Coating + 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. Opening neat, smooth, no broken edges, no tremor phenomenon, chip Easily. Small incision resistance,feature drilling stably, fast speed, not breaking the border. Mainly used for drilling marble, tile, limestone, brick, concrete, slate mable, stone processing, granite light stone and other hard material. Package Included: 1 x Hole Saw. Note: Please make sure that water must be added during drilling to prevent drill burning.