High-quality bits made of stainless steel for hexagon socket screws. Wera stainless steel tools are manufactured from stainless steel, preventing unsightly rust from foreign sources. The Hex-Plus profile provides larger contact surfaces in the screw head. This minimizes the notching effect, nearly eliminating damage to the screw head. With a torsion zone: Torsion bits absorb peak torque in the torsion zone. This prevents premature wear and extends the lifespan of the bit. 1/4" hexagon, compatible with holders according to DIN ISO 1173-D 6.3.