Mgtgbao 10pc 3/16¡± Dry Diamond Drill Bits Set£¬10PCS 5mm Hex Shank Core Drill Bit Brazed with Cooling Wax for Porcelain Tile Ceramic Concrete Granite Marble Hard Materials (not for Wood). Xynover Our multi quantity packs will

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Mgtgbao 10pc 3/16¡± Dry Diamond Drill Bits Set£¬10PCS 5mm Hex Shank Core Drill Bit Brazed with Cooling Wax for Porcelain Tile Ceramic Concrete Granite Marble Hard Materials (not for Wood). Xynover Our multi quantity packs willAbout this item ?? Dry Drilling Design: while dry drilling,wax lubricant inside diamond core drill bit could cool the cutting surface; Water can be used as additional cooling for long time drilling ?? 10pc 3 16 (5mm) Dry diamond drill bits with hex shank. Diameter 3 16 total length 65mm ?? 1 4 inch Hex Shank Quick change hex shank provides better chuck grip and fits different styles of drills. Application Diamond tip drill bits designed for porcelain,