Lasts up to 1.5 times longer than a Bosch SDS max-3 drill bit. Reinforced concrete is commonly used in infrastructure, commercial, and residential construction. Our PRO SDS max-4 hammer drill helps construction workers effectively drill into this material. The drill bits feature a robust 4-cutter design that prevents them from jamming or breaking when hitting rebar. The 4-cutter head made of high-quality tungsten carbide offers comfort for professionals who need to drill precise holes in reinforced concrete. The spiral with deep channels effectively removes dust and debris generated when drilling with large diameter SDS max bits. Therefore, our SDS drill bit delivers excellent performance for an even longer time. Compatible with all SDS max hammer drills.