This large special bit set for 1/4" drive is comprised of special,high quality industrial chrome-molybdenum-silicon-manganese-vanadium steel alloy. Including screwdriver with positive spring-sleeve holder, magnetic holder for work with electric screwdriver or drill, adapter with male square and male hex drive and mating attachment with female square and female hex drive. Also comes with special attachment for centrically clamping screw hooks and similar parts. Each part is marked exactly and clearly. The set comes in a sturdy powder finished steel box.
With this special bit set you can open all security screws, even those which cannot be opened with commonly available tools.