Wera Pozidriv Screwdriver Bit, PZ2 Tip

Wera BTH BiTorsion® Bits

Wera BiTorsion bits have special heat treated torsion zone that has a lower hardness than the shaft tip. The peak loads are cushioned preventing premature breakage and distinctly extend the service life.
Wera BiTorsion bits are recognisable through the letter B (for example, 855/1 BTH), their gold colour and green band.