Wera 05071083001 3851/4 Stainless Steel 1/4'' Hex Phillips Insert Bits are high quality bits made out of stainless steel designed for phillips and cross-recess screws. Wera Stainless Steel Bits is the solution to the extraneous rust problem. Wera 3851/4 1/4'' Hex Stainless Steel Phillips ® Insert Bits are vaccuum ice-hardened, are designed with a 1/4'' hex and are suitable for hokders as per DIN ISO 1173-F 6.3.