HEAVY DUTY DRILL BIT - Cresthome heavy duty concrete drill bit is designed for hard stone stuff and offers fast drilling and smooth performance with less chipping to improve the working efficiency and no broken edges. Vacuum brazed side protection provides accurate cut and steel core protection. PREMIUM MATERIAL - The diamond drill bit is designed with premium quality, durable, and long-lasting diamond and strong steel body with laser welded technology to avoid segments off and provide stable drilling. Perfect for heavy duty use for dry or wet drilling. FAST & SMOOTH DRILLING - This hole saw drill bit offers fast and smooth drilling with no broken edges. You need to add sufficient water to help cooling the bits which could extend the work efficiency in case you drill through thick granite. Angle grinder or handheld core drill is recommended for better performance. WIDE APPLICATION - Our heavy-duty diamond core drill bit is perfect for drilling marble, hard granite, concrete, engineering stone, bricks, porcelain tile, stone, and Mansory. Ideal for dry drilling holes, smoother core, easier bit removal and drilling the faucet mounting holes in stone countertops, plumbing lines in showers, etc. SIZE - This stone drill bit has ideal size and fits your standard drill. It comes with 3 inches diameter and 2 different lengths; 2 inches and 6.92 inches with standard 3/8-inch shank for standard cordless drill or electric drill. Ideal for precise and clean cut with brilliant speed on different kind of stuff. CRESTHOME brings heavy duty diamond core drill bit with laser welded technology for durable, precise, efficient and clean cut at aggressive speeds according to the materials. You can use the high-performance diamond core drill bit for natural stones wet or dry but using it wet will extend the life and improve the drilling effect. Vacuum brazed side protection provides accurate cut and steel core protection. How to Use: Place the drill at a 45-degree angle Drilling till the hole start to form Bring the drill into upright position Keep drilling continue and swaying the machine along a circle. Recommended use with hammer drill. Benefits of Choosing Us: Laser Welded Technology Vacuum Brazed Protection Aire Vent Cooling System Diamond Core Heavy Duty Durable and Long Lasting 2 different lengths Versatile What’s Included: 2 size rods included (2 Inch & 6.92 Inch) 2-inch Diamond Drill Core Bit BUY CRESTHOME high performance diamond core drill bit TODAY and take your drilling experience to the next level. Angle grinder is strongly recommended to use for this drilling bit.