Shockwave impact-resistant accessory is the system solution for impact screws. The innovative system accessories are not only impact-resistant and therefore suitable for use with impact wrenches, but also offers the right accessories for all drilling and screwdriving applications. Shock Zone Geometry. The flexible shock zone in the screwdriver bit reduces the load on the bit tip and thus the risk of breakage. The combination of the shock zone and a special hardening process absorbs the impact impact. The Shockwave bit tip is not milled, but cold-forged, which ensures a higher material strength and precise fit and s optimum power transfer to the screw head. Special steel: The steel alloy developed for Milwaukee is specially designed for use with impact wrenches. The bits are therefore more stable and at the same time more flexible - ideal for hard screwdriving.