BGTEC Dry Diamond Drill Bits Set - 5pcs 1/4" Tile Drill Bits and 5pcs 1/4" Carbide Drill for Granite Marble Porcelain Ceramic

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About This Size: Total 10 pieces, 5 pcs dry diamond drill bits (1/4" 6mm), round shank and 5pcs Carbide Drill bit (1/4" 6mm) Application: For Granite, Tile, Ceramic, Marble, Stone, Porcelain, Masonry. Use water for longer time Wax inside: For cooling,our Diamond Tipped Drill Bits have wax cores built-in which automatically absorb and dissipate heat as you go. Vacuum Brazed technology: Higher efficiency, faster working speed, longer service life. Note: Used for hand drill and bench drill,Hand drill at 2000-5000RPM, the slower the shorter the life. Overview Material : Diamond Shank Diameter : 6 Millimeters Cutting Diameter : 6 Millimeters Finish Type : Diamond Shank Type : Round Show more