This 8-piece Bosch Impact Screwdriver Bit Set is designed for heavy-duty applications, even withstanding the high power of impact drivers. It features an extended torsion zone for sturdiness and long-lasting work. Made from S2 Modified Steel with an optimized heat-treatment process, these bits offer extra-tough endurance for high performance in plant installations or heavy industrial work. The set includes a magnetic bit holder for a firm grip and fast bit changes. All bits have a 1/4" external hex shank, compatible with drill drivers, screwdrivers, and impact drivers. Set contents: 50mm bits (PH2 x2, PZ2 x2, T20, T25, T30) and a Universal Magnetic Bit Holder.