The SDS-Plus MX4™ drill bits are engineered for the toughest concrete and rebar drilling applications. Featuring a fully welded solid carbide tip (up to ⌀20 mm), these bits deliver maximum durability and unmatched drilling speed. The 4-cutter solid carbide tip, with a sharp centering point, rebar guards, and advanced dust grooves, ensures clean starts, precise holes, and extended life even when drilling through rebar. The optimised flute design with a reinforced core combines SPEED and HEAVY-DUTY spirals for fast debris removal, reduced friction, and superior stability. The convex shank maximises energy transfer from tool to tip, boosting impact force and jobsite productivity. For diameters above 20 mm, a one-piece slotted carbide tip provides exceptional strength, break resistance, and long bit life. PGM certified and made in Germany, these bits meet industry standards for precision, safety, and reliable performance on every jobsite.