Project Farm tests the following #2 Phillips Impact Driver bits:
- Milwaukee Shockwave,
- Harbor Freight Warrior,
- Wiha, and
Driver bit “grip” or twisting force required to cause cam out compared to driver bit wear after driving 100 drywall screws into a pressure-treated 4x4s.
Each impact driver bit is tested for metal hardness, the twisting force required for cam out after use, and the twisting force required to break the driver bit.
In the end, Project Farm determined that the Milwaukee Shockwave #2 Phillips Impact Driver bit (via Amazon) was the best overall, with impressive results too from Bauer.