Master Wholesale Wet or Dry Cutting RockMaster Diamond Hole Saw Bits are a fast cutting bit, good for drilling through granite, marble, porcelain and ceramic tile, and natural stones. They are designed for use in a 3/8" or 1/2" drill and feature a removable pilot bit for hard materials such as granite and marble. These bits may be used either wet or dry and can be used on material up to 1-3/4" in thickness. Both non-coring and coring hole saw bits depending on size of the bit.