This Bosch 3/4 in. x 8 in. Flute x 13 in. L SDS-MAX Rotary Hammer Drill Bit features a carbide-tipped X-head designed to retain its sharpness longer for longer-lasting performance, while the shank is designed to withstand more wear over time. Bosch brings constant innovation to concrete and masonry drilling. From inventing the industry standard SDS system to custom-manufactured carbide and diffusion bonding, the result is better performance and durability.