DT-DIATOOL Diamond Core Drill Bits 8pcs/Set 6/8/25/35/51mm for Porcelain Ceramic Tile Marble Granite Stone Hole Saws with 4 1/2 Inch Cutting & Grinding Blade, Hex Adapter and Saw for Grout Cleaning - DT96558K1T

• UPC   791180038272
• 1set/8pcs Contains：5pcs(6/8/25/35/51mm) drill bits and 1pc 4.5 inch(115mm) Cutting & Grinding Wheel and 1pc hex shank adapter and 1pc Cleaning Remover Knife, totally 8pcs/box. Multi-purpose: diamond drill bits used for dry or wet drilling tile, marble, quartz, etc. Diamond cutting &disc can used for edge grinding, but don't cut in curves like in the video unless you have experience. The knife can be uesd to clean the seam. Boxed package: The drill bit is easy to store, the box is portable and used repeatedly. Machine universal: with hex adapter, you can use these drill bit on the hand drill. Notice: please keep drilling at a high speed if you use the hand drill. General speed of hand drill is 2000-5000RPM. The higher the speed, the longer the worklife of drill bits. Advanced technology: Vacuum brazed technology provides much longer working life than electroplated technology. High quality diamond grain provide fast and smooth drilling.