28mm Diamond Hole Saw with Centering Guide Drill Bit, Tile Hole Saw with Diamond Coating, Diamond Core Drill Bit for Glass, Tile, Ceramic, Marble, Granite

Diamond Hole Saws: Made of carbon steel and equipped with a diamond-tipped bit, these are ideal for drilling through tiles, porcelain, glass, marble, ceramics, etc. Precise Hole Drilling: The pilot drill bit design prevents slippage and makes drilling holes in tiles easy and precise. Longer Lifespan: The thick, uniform diamond coating ensures superior performance. The large clearance hole on the side allows water to cool the hole saw and remove chips more quickly. Instructions for Use: Continue drilling vertically. When a round hole is drilled, you can remove the pilot drill bit and continue drilling. Maintain the rotation speed between 500 and 800 rpm and use water to ensure the saw is cooled.