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 a smooth nickel-plated surface, the glass drill bit has a low minimum resistance and makes it easy to drill precision holes. 【15 Different Size Diamond Drill Bit Set】6mm (1/4 "), 8mm (5/16"), 10mm (3/8 "), 12mm (1/2"), 14mm (9/16 "), 16mm (5) / 8 "), 18mm (11/16"), 20mm (3/4 "), 22mm (7/8"), 25mm (1 "), 26mm (1-1 / 32"), 28mm (1-3) / 32 "), 30mm (1-1 / 8"), 40mm (1-1 / 2 "), 50mm (2"). Meet your different needs. 【Adjustable Drill Guide】No need to worry about scratching your tile when drilling the hole. Our Adjustable hole saw drilling guide with suction cup and 4 bearings.From 6mm to 50mm all the hole saws can fit in this guide. 【Great Helper for you】It can be attached to electric drills, rechargeable screwdrivers, and drilling machines to drill holes in glass, tiles, as well as marble and granite.Help you with home modification, wine bottle craft, glass or procelain pot modification. 【Warm Tips】Reducing drill speed, lower drill pressure and increasing the use of water lubrication will significantly extend the life of the drill bit.