
I was very happy to receive these as I had to install Phillips #2 drywall screws and Robertson #2 decking screws. This product seemed like a great idea so I didn't have to keep changing bits on my impact wrench. They work great with Phillips head screws, but not so well with Robertson head screws. The traditional Robertson bit has a straight tip that provides a large contact area in the square screw hole. Since these bits must also work in Phillips holes, the tips are tapered. As a result, the contact surface is too small and the bit will slip off if you don't push it hard enough. The tapered tip doesn't hold the screw straight either. Design flaw aside, these bits have excellent finish and hardening.

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