For rotary drilling into glass and soft ceramic materials, a pointed centering cutting edge that can be sharpened at any time allows for precise drilling. The quarter-inch hex shank ensures it doesn't slip and fits perfectly in any cordless chuck. Professionals recommend that these bits perform best at low speed; stop frequently and dip the tip in water to cool it down and clean off the residue.

While there is an initial increase in financial outlay, using this set allows you to start with the smallest size drill and work your way up to the required hole diameter. This approach will exponentially lengthen the life of your tile bits. Additionally, the pack helps prevent you from losing the bits.