Artu Cobalt Tile Bit And Pilot Bit Porcelain 1/4 " Dia, 5/32 " Dia Carded

For rotary drilling only. Includes 5/32 pilot bit which must be used first. Ideal for drilling porcelain tiles up to a scratch hardness of 8. The drill bit will not walk, tape or center punching is no longer needed. Flat bottom parabolic flute ensures fast and efficient removal of drill dust and prevents clogging. Cuts nice, clean holes with very little or no chipping; operate drill motor 400-600 RPM. Ideal for drilling porcelain tiles up to a scratch hardness of 8 Rotary drilling only Cobalt and tungsten carbide tip Chrome vanadium steel shank Unique 4-face point grinding Flat bottom parabolic flute ensures fast and efficient removal of the drill dust and prevents clogging Extreme low drilling pressure with excellent centering prevents walking - no tape or center punching needed Diamond ground PORC+ cuts nice, clean holes with very little or no chipping