uptoak 2pcs 22mm Diamond Drill Bit Hole Saw on Tile Glass Marble Granite Fiberglass Ceramic Instrument

Diamond Drill Bits Smooth and exact finish for lowering incision resistance and drill pressure, increasing the sharpness, and effectiveness of water lubrication. Long Service life Nickel plating on the bits for good resistance to corrosion, can maximize tool’s life. Excellent for making holes on glass or ceramic. Clearance Hole Diamond drill bits with clearance hole facilitate the entrance of cooling water and escape of chips and other particles from drilling. Makes drilling process easier. Package Included: 2 pieces of 22mm Diamond coated hole saw / drill bits.