General description The GRAFF 68mm hole saw is specifically designed for drilling blind and through holes in concrete, masonry, and silicate bricks, making it ideal for tasks such as installing sockets and rosette plates. Technical specifications Diameter: 68 mm SDS Plus adapter: 110 mm (M22 thread) Center drill: 8 x 110 mm Benefits Made of robust steel with air holes for effective ventilation of dust and chips during drilling. Features asymmetric teeth made of primary tungsten carbide hard alloy with welded segments for enhanced durability. Special design prevents overheating, suitable for impact drilling with impact drills, hammer drills, and drill presses.