The Bosch 1-1/2 in. x 18 in. x 21 in. Carbide Spiral SDS-MAX Rotary Hammer Drill Bit features a carbide tip to provide durability. The reduced-vibration design enables easy drilling and the 4 cutting edges offer versatility. 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.