Power-tool driving isn’t a steady push. The sharp jolt at startup and the sudden stop when a screw seat can put real strain on a bit. The Wera 851 BTZ is built for those moments, with a BiTorsion zone that helps absorb peak loads and reduce premature wear.
Its tough design is suited to screwdriving in hard materials. Use it in a compatible standard bit holder or pair it with a Wera BiTorsion holder for two stages of cushioning: the holder responds to lighter loads, while the bit’s shaft helps manage higher peaks. Either way, it’s a practical bit to keep within reach when the work gets demanding.
Key Features
BiTorsion bit shaft: Helps absorb sudden peak loads during power-tool use.
Tough design: Suited to screwdriving in hard materials.
Flexible setup: Works in a compatible standard holder; pair with a BiTorsion holder for the two-stage system.
Take it easy tool finder: Color coding by profile and a size marking help you identify the bit quickly.
1/4-inch hex drive: Wera connecting series 1 for compatible holders and drivers.
Ready for hard materials and the sudden stops that come with the job.
