SALI Diamond Drill Bit 70 mm Diamond Hole Saw Drill with Center Guide Bit Glass Hole Saw Core Drill Bit for Glass/Tile/Ceramic/Marble/Limestone/Fiberglass/Porcelain Cutting

• High Quality: SALI diamond drill bits are made of industrial-grade high-strength carbon steel,which is effective against corrosion and rust. The diamond surface coating of the drill bit, the coating is thick and uniform, and the wear resistance and life of the hole opener are improved
• Unique Design: Compared with traditional glass hole saws, our hole saws have positioning aids. The pilot bit in the center can help you to position accurately, ensure that the drilling will not slip, won't get stuck, and help to cut precise holes
• Chip Removal Design: The cutter head part of our diamond drill adopts a notch design with clearance holes on the side, which facilitates the entry of cooling water, and ensures that chips and other particles escape from the drill hole during operation, so that the hole can be drilled. The process is more convenient and efficient
• Using: Water is required for lubrication when drilling, which can extend the life of the drill bit set; When cutting hard materials it is important to ensure the cutter is kept cool to avoid damage to the material being drilled and premature wear of the cutter
• Multipurpose: Our Diamond Drill Bit is suitable for drilling glass, tile bottles, blocks jars, fiber glass porcelain tile ceramic, vitrified, brick and stone.(especially for glass and tile).Suitable for cordless drill, lithium drill, bench drill. 【Notice: Keep diamond core drill cooling with water while drilling, otherwise the diamond core drill will burn】

SALI Diamond Drill Bit Diamond Hole Saw with Centre Drill Glass Drill Bit with Diamond Coating 45# Steel Diamond Hollow Core Bit Tile Drill Bit for Drilling in Ceramic, Porcelain, Glass, Marble, Slate SALI diamond hole saw with centre drill bit 1. drill a clean hole in glass, tiles, marble, porcelain and ceramics etc. 2. with pilot drill to avoid the annoying slipping and to drill a precise hole. 3. a wide range of diameters are available to meet your daily requirements. 4. thick diamond coating ensures longer tool life. 5. uniform diamond coating provides excellent performance. 6. through hole allows water to cool the saw and remove chips faster. 7. compatible with electric drills, cordless drills, bench drills. Instructions for use: 1. always use water for cooling, otherwise the diamond core bit will burn. 2. remove the centre drill bit after drilling the circular slot to ensure a long service life. 3. reduced drilling speeds, low drilling pressure. 4. hole saws are consumables and their service life varies with different material hardnesses. 5. not suitable for metal, tempered glass and not in impact mode.