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Highlight description: [Easy Cutting] Dry Diamond Drill Bits with Vacuum Brazing Technology allows for easy cutting of hard tile, ceramic, marble and slate at higher temperatures using a dry drill bit. The body diameter is easy to recognize. [Suitable for Most Electric Drills] 6.35mm (15/64") quick-change hexagonal dry drill bit, can be changed quickly, suitable for most electric drills, rechargeable drills, hand wrenches and driver chucks. Detailed description: Specification Product name: Dry Diamond Drill Bits Material: diamond Overall length: 65.6mm Shank size: 6.35mm Hole size: 6mm Color: black Parts List: 7 x Diamond Drill Bits Notes: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement.