Alpen Drill Bit for Very Hard Porcelain Materials "6 mm.  Kit of 2 drill bits. Without refrigeration,

Alpen Very Hard Porcelain Drill Bit - Measurement: " 6 mm. -This kit is made up of 2 drill bits, a diamond drill bit to start drilling hard materials and another concrete drill bit to continue the work. -Application: For extremely hard stoneware tiles with a Mohs/Ritz hardness of 9 and glass and porcelain.  Refrigeration is not necessary.  Not suitable for hammer drilling. -Without drilling difficulties, get a precise hole thanks to the centering tip. -Carbide plate integrated into the cutting plate to increase resistance to breakage. -The red ring indicates the optimal drilling depth. -Shortened neck to reduce torque forces, reducing vibrations and increasing service life. -Non-slip stem, preventing rotation in the drill chuck and transmitting optimal torque. The trick to a perfect hole: the right drill bit. Leave your nerves aside when drilling tiles. TONow you can make any hole without the risk of breaking it!  A perfect hole without cracks.  Exactly what you wanted. The new C PROTECTOR from ALPEN achieves this thanks to the unique geometry of its carbide plate.  The new conical integration of the cutting plate increases resistance to breakage.  At the same time, the temperature deviates rapidly.  Its shortened neck increases the stability of the bit and reduces twisting forces, resulting in increased tool life. The new non-slip shank with its special six-groove design prevents rotation in the chuck and ensures optimal torque transmission.  These guarantees are so convincing that soon you will no longer be able to wait to drill the next tile. Even the spindle speed is higher compared to existing power tools - and without cooling!