Product details : WERA 059810 851/4TZ BIT PH2/50 EXTRA TOUGH TORSION
TZ-Bits are tough bits with a torsion zone. Torsion bits absorb the damaging peak torque loads in the torsion zone. this prevents premature wear and enhances the service life of the bits.
Strengths
For phillips screws Ductile and tough for hard materials Torsion design against premature wear Suitable for AEG, ARO, Atlas-Copco, Biax, Black & Decker, Bosch, Buckeye Tools etc.