General description The GRAFF 68mm hole saw is specifically designed for drilling blind and through holes in concrete, masonry, and silicate brick, making it ideal for installations such as electrical sockets and rosette plates. Technical specifications Diameter: 68 mm SDS Plus adapter: 110 mm (M22 thread) Center tip: 8 x 110 mm Advantages Constructed from durable steel with asymmetrical teeth made of hard primary tungsten carbide alloy. Features ventilation holes for effective dust and chip removal during drilling. Designed to prevent overheating, suitable for impact drilling with hammer drills and rotary hammers. Includes a replaceable center tip for extended usability.