HiSpeed bit technology for extremely fast dry drilling. Ideal for use with the Beast/B+BTec dry drilling kit and a certified HEPA vacuum. Use dry or wet. The PRM Series Dry Masonry Core Bits are ideal for making pass-through penetrations in brick,block, and other masory applications. They are engineered with a solid thin wall tube with widely spaced turbo style diamond segments that allow for fast drilling and aid in heat dissipation.