Tough Wera bits prevent the tip from breaking prematurely. Z-bits usually are the bit for universal screwdriving applications.
851/4 Z SB bits
- For Phillips screws
- Tough for hard materials
- 1/4" hexagon drive (Wera connecting series 4)
Tough bits

Product details
Facts and figures
Part number
05073520001
05136305001
05073521001
05136306001
05073522001
05136307001
Article Detail
1 x PH 1x89
1 x PH 1x152
1 x PH 2x89
1 x PH 2x152
1 x PH 3x89
1 x PH 3x152
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Product description
High quality bits with Torsion zone - where kinetic energy is diverted from peak loads. This greatly extends the product service life. Tough viscous, for universal use. ¼" hexagon, suitable for holders as per DIN ISO 1173-F 6.3.



