The DeWALT DT942 Series SDS Drill Bit is designed for drilling reinforced concrete, masonry, natural and artificial stone. It features a 4 flute helix with maximum flute entry for faster debris removal, and a reinforced core for optimum impact and breakage stability. The solid two cutter head is flanked by two individual cutting tips, delivering a fast and efficient drilling speed. Its superior carbide grade and geometry ensures greater resistance to breakage and premature wear for maximum drill bit life and durability. This bit has a 28mm diameter, 450mm overall length, and a 250mm working length. It is compatible with SDS Max shanks and has a 140° point angle. Sold as a single unit.