$54.99 NEW Roberts/Qep 10568Q 1/4-Inch Porcelain, Marble, Granite Diamond Drill Bit 10306105682 | eBay
1/4 inch Glass Drill Bit Diamond Coated Core Drill Bit Hole Saw, 1/4 Diameter DIAMOND COATED 
1/4 Hex Shank Diamond Tip Drill Bit Quick Change Stable Performance For Tile Drilling
