Bosch Accessories' new X5L Hammer Carbide bit uses a diffusion bonding process where the carbide and steel are bonded together at the molecular level for a stronger bond that lasts longer when cutting through concrete and rebar. The bits were designed with HVAC, electricians, plumbers and general installation and commercial construction professionals in mind. Bits range in diameter size from 3/16" to 1/2" and are offered in 4" to 18" lengths.