Wera TS Torsion Stainless Steel Bits.-Stainless Steel screwdriver bit for use with stainless steel screws. -The use of stainless tools with stainless steel fasteners prevents the cross contamination of metal, preventing rust from a galvanic process. -Vacuum ice-hardened for industrial strength. -A Torsion zone absorbs peak loads and prolongs the life of the bit. -For use in the construction and food industries or wherever stainless steel fasteners and materials are used. -Stainless steel for minimising rust. -Special Torsion-style design to reduce premature wear.-Length: 25mm.-Drive: 1/4" Hex.