Cut large, accurate holes through common building materials with the OX Spectrum Superior 182mm Superfast Helix Dry Diamond Core Drill. Designed for professional dry drilling, the unique helix barrel draws dust away from the cutting area, while angled slots help expel debris. Its high-concentration 10mm diamond segments are laser welded for excellent strength, durability and a long working life. Genuine OX Spectrum Superior diamond core. Universal dry core for professional use. Unique helix barrel improves dust removal. Angled slots help expel drilling debris. 10mm high-concentration diamond segments. Laser-welded construction for strength. Suitable for semi-engineering brick. Suitable for clay products and masonry. Suitable for limestone aggregate concrete. Connection: ½-inch BSP female thread. Quantity: 1 core drill bit. Use with rotary action only. Do not use the hammer or percussion setting. Regularly withdraw the core during drilling to clear accumulated dust and help prevent overheating.