This is brand new, unused and boxed. Professional-grade dry diamond core bit from Saber Impact Diamonds, a well-regarded trade brand known for durability and consistent cutting performance. The larger 152mm size is ideal for heavy-duty applications and larger service penetrations. Suitable for dry drilling. Brick. Block. Masonry. General construction materials Commonly used by builders, electricians, plumbers, HVAC installers and general construction trades. Supplied in original box as shown.