Bosch 2608596052 Carbide Multi Construction Drills 5.5mm manufactured from fine grain durable carbide plus active centering tip for cutting through concrete, optimised soldering and hardening technology increases robustness of the drill and vibration. Other features includes diamond ground cutting edges, four spiral dura design, special slot for multi-function drilling plus reinforced core diameter giving these 5.5mm Bosch Carbide Drills greater durability and stability through concrete. These Multi Construction drills will tackle just about any material including concrete, masonry, brick, aluminium, laminates, light building materials ceramic tiles and sheet metal.