Up to 50x more robust than a Bosch 2607001528 Extra Hard Bit Highly efficient for installers, electricians, metalworkers, and woodworkers: Robust 1/4" Impact rated Hex shank for use in impact driver and drill driver For driving T screws efficiently, eg when installing all types of panels, equipment, and fixtures Scope of delivery: Bosch PRO Torx Impact Bit, T25, 55 mm, 2 pcs, Manufacturer: Bosch