DT-DIATOOL Diamond Core Drill Bit Set - 19/28/35/45/51mm Tile Hole Saw Kit with 20mm Diamond Finger Bit & 2 Adapters for Porcelain, Ceramic, Marble, Granite - Perfect for Bathroom Renovation, Kitchen Backsplash & Tile Installation Projects

Specification Easy carry Set of drill bits packed in a portable aluminum box. Full Size 4pcs drill bits 19/28/35/45/51mm1pc 20mm diamond finger bit.2pc drill bits adapter Application Drills Bits for dry or wet drilling holes;Finger Bits for grinding, enlarging or shaping holes .Work on porcelain ceramic tiles, granite, masonry, marble, concrete, etc. How to use hex adapter Step 1 The drill bit is suitable for 5/8" arbor angle grinder.If you need to connect it to your electric drill, you will need to use an adapter, such as sds, hex, round plus shank, ect.Connect the threaded side of the hexagonal shank adapter to the drill bit. Step 2 Check that the connections are tight and correct. Step 3 Connect the end of the hexagonal shank with handle to the electric drill.Turn on the electrill drill and let the drill bit rotate in the air to check for problems.Once there are no problems, you can use it normally. U-shape teeth U Shape incision can reduce cutting resistance. Vacuum brazing technology makes the diamond firmly bonded to the matrix, and the diamond exposure is higher. The processing efficiency is higher, and the service life is longer. Chip drain design Chip drain design of both sides makes the escape of chips or other particles of the drilling quickly removed. Good effect Ideal for drilling the faucet mounting holes in stone countertops, plumbing lines in showers and vanities.