1-3/8 Inch Diamond Finger Milling Bits Ball End, 35mm Dry Core Drill Bit with 5/8-11 Thread and 3/8” Hex Adapter for Angle Grinders and Drills to Enlarge, Shape Holes in Porcelain Tile Ceramic Granite - DECKRKAT, DECK-025

• Unique Ball Nose End Diamond Bit: Diamond Finger Milling Bit is perfect for jobs to enlarge, and shape circular holes, drain holes in tiling projects in bathroom and kitchen to fit tiles perfectly around pipes, faucets, shower valves. Unique Ball nose end design can do more things than flat ones, such as tapping Designed for Hard Materials: This Diamond Hole enlarger bit works perfectly for enlarging or trimming holes in porcelain sink, limestone vanity sink top, ceramic bathroom sink, thick granite countertop, marble, stone, even quartz countertop, which is harder A Tool to Save you Time and Money: when you upgrade or replace the bathrooms faucets, you may find the new faucets are a bit larger than the old ones, with this Diamond Finger Milling Bit to enlarge the hole in a minute, you can save a lot of trouble and time and money Easy to Use: Package includes 1 piece of 1-3/8 inch (35mm) Vacuum Brazed Diamond finger bit, hole depth up to 50mm, with 5/8-11 Thread and 3/8" Hex adapter for most angle grinders and electric drills. please take your time and do not force the bit. to keep the bit cool will help the diamond stay durable. High Quality: This diamond finger bit is heavily coated diamond coated, both sides and the end, as a result, it can grind wet or dry, no chips, scratches or bumps. it can make beautiful smooth holes. If you are not familiar with diamond bits,we may recommend to do some test holes in scrap to get the feel for it