Product Description BOSCH brings constant innovation to concrete and masonry drilling. BOSCH developed custom-manufactured carbide and diffusion bonding technology to provide better performance and durability. Spline thru-hole rotary hammer bits offer less vibration and quieter operation thanks to an efficient design that maximizes the power of the hammer. From the Manufacturer Bosch offers a full line of carbide bits, carbide cores and steel points and chisels for hammer drills, rotary hammers and demolition hammers.