Artu Model 01440, Porcelain Drill Bit, 5/16"
For use with any rotary drill. 5/32 pilot bit must be used first. Ideal for drilling porcelain tiles up to a scratch hardness of 8. 4-face point grinding ensures the drill bit will not walk, tape or center punching is no longer needed. Ground double flute ensures fast and efficient removal of drill dust and prevents clogging. Cuts nice, clean holes with very little or no chipping.
CHROME VANADIUM STEEL