Yking - 50 mm Diamond Core Bit - It can be used for hard, brittle, granite, marble and stone materials. It has a side groove for easy removal of cut material. It makes hundred of holes with water as lubricant and coolant. Premium sieved diamond grit is used with nickel as a binder used on a suitable steel shank precision and long life. It has a uniform and high diamond concentration permitting fast and smooth cutting action without exit chipping. It is simple to use and fit any portable electric drill.
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