Specification: Size: 18mm / 0.71". Suitable for Stone, Tiles, Ceramics, Glass and , etc Processing. The bit in the center helps for cutting accurate holesLong life: Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit lifeClearance Hole: Diamond drill bits along with clearance hole facilitate the entrance of cooling water and escape of chips from drilling. Makes drilling process easierSharp & Smooth Cut: Diamond hole saw creates high precision, smooth cuts with no broken edges. White Zinc plating on the bits maximizes tool’s life with great resistance to corrosionPlease Note: Water is required for lubrication and cooling when drilling. Not for use on concrete or for depths beyond about 1/2 inch.
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