9 Piece Dry Diamond Drill Bits Set, Tile Drill Bits for Glass, Granite, Ceramic, Tile, Quartz Stone, Sizes 1/4" 5/16" 3/8" 1/2", Built-in Solid Cooling Wax, Fast Dry Drilling, Round Shank

9 Piece Dry Diamond Drill Bits Set, Tile Drill Bits for Glass, Granite, Ceramic, Tile, Quartz Stone, Sizes 1/4" 5/16" 3/8" 1/2", Built-in Solid Cooling Wax, Fast Dry Drilling, Round Shank