The Vaunt X 4 Piece Vacuum brazed diamond hole saw set is ideal for the toughest materials such as granite, marble, porcelain tiles, stone and brick. The M14 fitting allows direct connection to an angle grinder and the high diamond content and vacuum brazing process ensures a permanent bond giving long-life and outstanding performance and accuracy. Bits from 6mm - 18mm are pre loaded with a wax to prolong the life of the bit and protect the work piece. The included guide helps keep your hole straight and true. Set includes: 1x 6mm Diamond drill bit, 1x 8mm Diamond drill bit, 1x 18mm Diamond drill bit, 1x 25mm Diamond drill bit, 1 x Hex to M14 adaptor, 1 x Suction guide, and a Carry case. Features: High diamond count, Vacuum brazed construction, Suitable for both wet and dry drilling, and Ideal even in the toughest materials.