Wera Stainless Torsion Pozi Bits prevent rust on stainless steel fixings caused by contamination from conventional steel tools. Vacuum ice-hardened to the same strength as conventional steel tools, and so suitable for tough, industrial use. Wera Stainless bits feature a unique Torsion zone, extending bit life over standard bits.Use with Wera stainless Rapidaptor bit holder.Application: Suitable for Pozidriv -screws1/4in Hexagon Drive, DIN 3126-C 6,3, ISO 1173.Tip: DIN 5260-PZ, ISO 8764-PZ, stainless steel, INOX.