This Spectrum Premium Gold Dry Diamond Core Drill 152mm is a universal dry diamond core drill. Spectrum dry core accessories fit perfectly in its ½" BSP female thread. A slotted barrel provides efficient dust clearance and makes it easier to remove the drilled core. This dry core drill is recommended for use on brick and blockwork. OX Spectrum Premium Gold Dry Diamond Core Drill - 152mm, Manufacturer: OX TOOLS The Spectrum Plus Gold Dry Diamond Core Drill is a universal dry diamond core drill that comes in all the popular plumbers sizes all the way up to 182mm. Spectrum dry core accessories fit perfectly in its ½ BSP female thread. A slotted barrel provides efficient dust clearance and makes it easier to remove the drilled core. Recommended for use on brick and blockwork. PTDOXGBD152