Choose The Dewalt DT9521 SDS Plus Extreme Drill Bit for Speed and Endurance The Dewalt DT9521 extreme drill bit has great performance in terms of speed, life, and endurance. Perfect for drilling materials such as concrete, masonry, stone and brick thanks to its superior carbide grade construction and hardened body. The new tip design ensures better bit penetration for optimum drilling performance and precision. Features: Optimised flute design allows efficient debris removal Hardened body for extra strength and reduced breakage Superior carbide grade for long life and greater durability New tip design ensures better bit penetration, longer life, faster drilling and greater durability Specification: Diameter: 6.5mm Total Length: 200mm Working Length: 150mm