30Pcs6-50mm Diamond Coated Hole Saw Drill Bits Glass Hole Saw Drill Bit Set Tile Hole Saw Kit for Glass Porcelain Marb

Specifications NameDiamond Coated Hole Saw Drill BitsMaterialSteel Diamond SandProduction ProcessElectroplatingColorSilverSizes6 8 10 12 14 16 18 20 22 25 28 30 35 40 45 50mm Feature ▲ Super Quality Diamond drill bits are made of industrial grade carbon steel with a nickel plated coated body to resist corrosion A thicken diamond coating on the tops offers superior cutting strength for maximum drilling outcomes ▲SharpSmooth Cut Coated with high quality diamond drill bit has a smooth and exact finish that lower the incision resistance and drill pressure increases the sharpness and effectiveness of water lubrication ▲ Wide Application Glass hole saw drill bit set allows you to cleanly cut glass ceramics porcelain ceramic tile porcelain tile limestone slate marble granite light stone and fiberglass ▲ Can be used with a standard electric drill not included ▲ Easy to use high quality good performance long life ▲ Note Please keep adding water when the tile hole saw bits are working on the glass or ceramics low drill pressure and increased use of water lubrication will extend drill bit life Using Steps Step 1 Clean the surface and mark down the position of the drill hole angle drill 45 degrees to start the hole slowly Step 2 Keep wet with water Step 3 Being drilling at low speeds Angle drill to vertical position once the hole has appeared Step 4 Slow speed down to drill the hole off and for the exit hole to prevent a breakthrough Pack Included 1 S