From OX Tools, the Spectrum Superior Superfast Helix Dry Diamond Core Drill is designed for dry core drilling across a wide range of building materials. Suitable for site work where clean, consistent progress matters, it can be used in most building materials including semi-engineering bricks, clay products and limestone aggregate concrete. A distinctive helix barrel design helps draw dust down the barrel, while angled slots extending through the back end are designed to expel dust during use. For added durability, the drill is laser welded to provide strength and help prevent segment loss. Key features 48mm dry diamond core drill Suitable for most building materials, including semi-engineering bricks, clay products and limestone aggregate concrete Helix barrel design draws dust down the barrel Angled slots extend through the back end to expel dust Laser welded for strength and to help prevent segment loss