Drywall Screws and Wood Screws are not created equal. Do you know the difference and how they are made differently?... Read More
Wood Screws are designed for use in furniture manufacturing operations and other demanding industries using hardwoods and other "tough" materials. "Drywall" screws are designed to penetrate a layer of powdery drywall and a soft wooden or thin metal stud.
Double Lead - Twinfast: Two threads are wrapped around the shank. One revolution advances the screw 2 pitch lengths advantageous on long screws or in situations requiring rapid assembly. Drywall screws typically use this thread since pull-out strength isn't as important as speed. These screws lack the pull-out resistance of "Deep" threaded screws.
That's why you should never use Drywall Screws in Woodworking applications.