The Extreme Flat Wood set are ideal for rapid drilling of holes. They would be used by trade professionals and home DIY users. The bits work best with natural hardwood and softwood, chipboard, and other man-made materials, to drill into door locks, mortising, electrical and plumbing work. Each bit has an extra thick robust steel shank for outstanding durability and chamfered outer cutting spurs for clean, fast drilling. They also have precision ground central point, which has an optimised design for faster material penetration and increased drilling speed. The DT70751-QZ set replaces the DT7943B-QZ. Supplied as a set.