SDS-plus-7X Hammer Drill Bit 5.5 x 100 x 165 mm. The SDS plus-7X drill bit offers excellent durability when drilling into reinforced concrete. Its 4-cutter full head is made from high-quality carbide, which reinforces the head and provides exceptional impact resistance. The consistent distribution of drilling force ensures that there is no loss of power, thereby increasing the overall lifespan. Bosch's unique diffusion welding technology (IDS) provides strong support between the head and the shank. Additionally, the 4-flute design with wide channels reduces wear on the drill bit by ensuring effective removal of drill cuttings. This drill bit is designed for use in masonry, concrete, and reinforced concrete. It is compatible with hammer drills featuring the SDS plus system.