Bosch Bulldog Xtreme 3/8" x 4" x 6" SDS-Plus Carbide Rotary Hammer Drill Bit, a powerful and durable tool designed for heavy-duty drilling in concrete and rebar. With a 4X longer life in rebar and 40% more life in concrete compared to competitive full head carbide bits, this drill bit is optimized for use with heavy-duty rotary hammers. It features less carbide wear than two cutters, making it more productive and efficient. The diffusion bonding technology provides a stronger carbide bond for a longer lasting bit, while the wear mark assures accuracy of hole diameter. The centric conical tip guides the bit through concrete and provides rounder holes. This drill bit is a reliable choice for professional contractors and DIY enthusiasts alike.