BAP Trade Diamond core drill bits have been manufactured for heavy duty applications through tough construction materials, including brick, masonry concrete. Thse core bits feature highly concentrated diamond particles and premium grade solid steel barrels, for increased drilling speed and extended lifetime. For use with drills with a motor of at least 850W for heavy duty drilling applications. Ideal for medium-hardness brick, concrete blocks, hard sandstone, coarse sandstone, soft slate, breeze block, lignacite blocks. Kit contains: 152 and 107mm Cores ideal for ducting pipes, extractor fans, 152mm for extractor fans, heat recovery vents etc. This 7 piece Diamond Core set it suitable for cutting, Granite, marble, limestone, slate, hard bricks and other dense and non-abrasive materials. Encompasses the industries most popular core sizes to suit Electricians, Plumbers and other major trades Laser welded diamond cores are designed for fast and easy drilling, in the most demanding of situations. Trade quality and fully compatible with Makita, Dewalt, Bosch and Milwaukee core drills Includes 2 x Core Drills 5 x Accessories 1 X 115MM Diamond Blade 1 x Aluminium carry case with foam insert