The Bosch PRO X-Lock Dry Speed Diamond Hole Cutter in 40mm is ideal for medium-sized penetrations through masonry and hard construction materials. This size suits cable and conduit routing tasks with ease. Features and Benefits: • Dry drilling in masonry for clean, efficient results • Diamond grit in premium metal matrix for long life and precision • X-Lock for fast, tool-free fitment • 22.23mm bore for standard locking nut angle grinders Specifications: Diameter: 40mm Bore: 22.23mm