OIIKI 20 Pack Diamond Drill Bit Set, 6mm (1/4inch) Small Diamond Hole Saw Kit for Glass, Ceramics, Porcelain, Ceramic Tile, Marble

20 Pack Diamond Drill Bit Set, 6mm (1/4inch) Small Diamond Hole Saw Kit for Glass, Ceramics, Porcelain, Ceramic Tile, MarbleSpecificationPackage Include: 20 PackHIGH QUALITY MATERIAL: The diamond drill bits are made of premium high-speed steel with nickel-plated coated body that resist corrosion. Thicken diamond coating on the tops offers the ability that each sharp bit for a few holes.DIMENSION: Hole diameter: 0.24inch/6mm; drilling depth: up to approx. 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 clearance hole facilitates the entrance of cooling water and escape of chips, 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 diamond tipped drill bits of any brand.TIPSStart drill at 45 Degree to surface and align to 90 Degree as hole forms.Water is required to cool down the drill when using them.AFTER SALES SERVICEIf you have anything concerned with the Diamond Drill Bit Set after use, please first to choose contact us and we will take care of it for you.here is how Find your order in your amazon account, click the " contact seller" button beside the order ID.

• HIGH QUALITY MATERIAL: The diamond drill bits are made of premium high-speed steel with nickel-plated coated body that resist corrosion. Thicken diamond coating on the tops offers the ability that each sharp bit for a few holes.
• DIMENSION: Hole diameter: 0.24inch/6mm; drilling depth: up to approx. 30 mm; total length: approx. 51 mm; shank diameter: approx.5.5mm; number of revolutions: max. 800 / min
• CLEARANCE HOLE DESIGN: Drill bits set along with side clearance hole facilitates the entrance of cooling water and escape of chips, making the drilling process easier and relaxiable.
• WIDE APPLICATION: The diamond coated drills are perfect for drilling glass, tiles, porcelain stoneware, granite slabs, tiles. Fit for any diamond tipped drill bits of any brand.
• TIPS: Start drill at 45 Degree to surface and align to 90 Degree as hole forms.Water is required to cool down the drill when using them.