Wera Stainless Torsion Phillips 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.Application: Suitable for Phillips screws.1/4in Hexagon Drive, DIN 3126-C 6,3, ISO 1173.Tip: DIN 5260, ISO 8764, stainless steel, INOX.3855/1 TS Bits, stainless Application: Suitable for Pozidriv*)-screws Drive: 1/4in Hexagon, DIN 3126-C 6,3, ISO 1173 Tip: DIN 5260-PZ, ISO 8764-PZ, stainless steel, INOX