Wera Stainless 3855/1 TS Pozidriv #3 Insert Bit, 1/4-Inch Drive Stainless 1/4 hex drive Pozidriv insert bit, PZ3 x 1" Manufactured from 100% Stainless steel, preventing extraneous rust caused by use of conventional tools contaminating stainless fasteners Torsion bits are designed to prevent premature wear and improved service life Partner with Weras Stainless Rapidaptor for ultimate protection against extraneous rust Limited Lifetime Warranty, German Engineered