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Package Include: 10 PackHIGH QUALITY MATERIAL: The diamond drill bits are made of premiumhigh-speed steel with nickel-plated coated body that resistcorrosion. Thicken diamond coating on the tops offers the abilitythat each sharp bit for a few holes.DIMENSION: Hole diameter: 0.24inch/6mm; drilling depth: up toapprox. 30 mm; total length: approx. 51 mm; shank diameter:approx.5.5mm; number of revolutions: max. 800 / minCLEARANCE HOLE DESIGN: Drill bits set along with side clearancehole facilitates the entrance of cooling water and escape ofchips, making the drilling process easier and relaxiable.WIDE APPLICATIONThe diamond coated drills are perfect for drilling glass, tiles,porcelain stoneware, granite slabs, tiles. Fit for any diamondtipped drill bits of any brand.TIPSStart drill at 45 Degree to surface and align to 90 Degree ashole forms.Water is required to cool down the drill when usingpacking: 1set of 10pcs