Holds 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 encountering rebar. The 4-cutter head made of high-quality tungsten carbide provides comfort for professionals who need to drill precise holes in reinforced concrete. The spiral with deep channels effectively removes dust and chips generated when drilling with large diameter SDS max drill bits. Therefore, our SDS drill bit offers excellent performance for an even longer time. Compatible with all SDS max rotary hammers.