DEWALT Drill Bit, 3/16 in. Dia, 2-1/4 in. OAL, Spiral Flute, 3/8 in. Dia Shank, Round Shank | City Mill
3/16 in Diamond Drill Bit 3/16 inch 3 Pack for Porcelain Tile Drill Bit Glass Drill Bit Diamond Tip Bit with Core Guide to Hold in Place and Prevent Jumping 5mm Porcelain