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Made of high strength and quality corundum powder of diamond sand and carbon steel with smooth nickel plated surface coating to ensure durability of usage;
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Easy, quick and smooth drill for hole; enhance the drilling speed to ensure a sharp, high precision and smooth cut without a broken edges in seconds;
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Capable of drilling into extremely hard materials such as marble, slate, glass, tile, stone and many more.
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The material needs only water for lubrication. DON'T DRILL HOLE WITHOUT WATER!
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These drill bits can be used with a standard drill, excellent for making clean and accurate holes, with both good performance and long life.