1/4 Inch Dry Diamond Drill Bits Set 20pcs 6mm for Ceramic Stone

Package Quantity: the package comes with 20 pieces of diamond drill bits of a drilling diameter of 1/4 inch/ 6 mm, the compatible size of most types of driller needs.Widely Applicable: the 6 mm diamond drill bit is perfect for drilling holes in hard materials, especially tile, porcelain floor, granite ceramic glass mirror marble tile, etc.; Note: it is not suitable for wood.Dry Drill Design: the ceramic drill bit is made of cemented carbide with wax cooling rods inside, which can melt and cool the cutting surface when dry drilling, and can cooperate with water cooling to better protect the machine.Broad Compatibility: diamond coating increases drilling speed of the granite drill bits; Round shank is compatible with most machines, such as hand drills, angle grinders, table drills; Depth markers are also useful for precise projects.Easy to Carry and Use: there is a storage box packaged together with the porcelain tile drill bits, which is helpful for preventing loss, meanwhile making the bits easy to use and store.Shank type: round shankSteps to Drill Clean and Precise Holes:1. Position the bit at a 45 degree angle to give the bit a chance to start and prevent the bit from slipping.2. Slowly move the drill to a more upright position, continue drilling and oscillate the machine in a circle.3. You don't need to apply too much pressure to let the drill do the job. After drilling, you will feel the drill bit break through the back of the glass or tile.4. Be careful when using it, because if you use it too fast, it may burn out a little of the glaze.Colour: as shownMaterial: Diamond CoatedPackage Contents:1 set * Diamond drill bitsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.