... intended for Granite, Marble, Porcelain, Atrifical and Natural Stone. Max RPM 12,000 Use Wet or Dry Product ... and hand-held drills.Application:Core Bit intended for Granite, Marble, Porcelain, Atrifical and Natural ... we offer factory competitive price;lSuitable quality for different market;lProfessional and experienced engineers can design ... Factory and Products: Diamond Core Bits for granite or marble