17Pcs Diamond Hole Saw Set, Kit Including 15Pcs Drill Bits 6 50mm,Adjustable Guide Jig Fixture for Glass, Porcelain, Ceramic, Marble, Tile, Granite

PREMIUM QUALITY - Made of high-strength carbon steel with smooth nickel-plated surface, the glass drill bit has low minimum strength and makes it easy to drill precision holes. Set of 15 diamond drill bits of different sizes: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm. 0 mm. 10,2 cm), 22 mm, 25 mm, 26 mm, 28 mm, 30 mm, 40 mm, 50 mm. Meet your different needs. Adjustable Drill Guide: No Need to Worry About Scratching Your Tile When Drilling the Hole. Our adjustable hole saw drill guide with suction cup and 4 bearings. From 6mm to 50mm, all hole saws can fit this guide. 【Very Useful for You】It can be attached to electric drills, rechargeable screwdrivers and drilling machines to drill holes in glass, tile, as well as marble and granite. Helps you with the modification of the house, wine bottle, glass or porcelain. Tips:Reducing drilling speed, reducing drilling pressure and increasing the use of water lubrication will greatly extend the life of the drill bit.