You need a good drill without water! Upgraded wet and dry drills Diamond Drill Bits: Brazed diamond process, no loss of drilling and durable.High-strength drill body: Forged with high-strength metal, no deformation, easy to open the hole.Longer working life:Provides longer working life than electroplating technology (typically 3-5 times longer) Applicable machines Suitable for Hand Drill and Bench Drill.Make sure all forms of impact or hammering action are turned off.Use a carbide tipped drill bit to accurately position the hole, or place the drill at a 45 degree angle to drill until the bit begins to penetrate the material, then raise the bit to a vertical position and continue. FiLLED WITH COOLING WAX The hole contains cooling wax to help dissipate heat and reduce damage to the drill bit, which can prolong the life of the drill bit. HEXAGON SHANK DESIGN The non-slip hexagonal shank design makes the drill more stable when working and avoids wobbling and other problems. DENSE DIAMOND The drill bit is covered with dense diamond particles, which greatly increases the sharpness of the drill bit and improves the drilling efficiency. PRECISE POSITIONING The sharp tip helps you make precise positioning before drilling, making your drilling more efficient and accurate! Overall length 65mm/2.56inch Sand high 8mm/0.31inch Shank diameter 6.35mm/0.25inch Diamond Grit #50/60 Diamond drill bits set Dimond core drill bits Add to Cart Dimond core drill bits Add to Cart Carbide drill bits Add to Cart Carbide drill bits Add to Cart Carbide drill bits Add to Cart Dimond core drill bits Add to Cart Dimond drill bits Add to Cart Customer Reviews 4.4 out of 5 stars 848 4.0 out of 5 stars 46 4.4 out of 5 stars 456 4.4 out of 5 stars 92 4.4 out of 5 stars 990 4.4 out of 5 stars 8 3.2 out of 5 stars 15 Price $22.99$22.99 $32.29$32.29 $22.99$22.99 $19.99$19.99 $19.99$19.99 $29.99$29.99 $20.99$20.99 Dry&Wet Dry Dry Dry Dry Dry Dry Wet Process Vacuum brazing Vacuum brazing High-frequency welding High-frequency welding High-frequency welding Vacuum brazing High-frequency welding Size 1/4" 1/4" 1/4" 1/4" 1/4" 1/4" 1/4" Shank Round shank Quick-fit hex shank Quick-fit hex shank Triangle shank Round shank Quick-fit hex shank Round shank Material Tile/marble/granite Tile/marble/granite/concrete Wood/plastic/marsonry/tile Wood/plastic/marsonry/tile Wood/plastic/marsonry/tile Tile/marble/granite Tile/marble/granite/stone