These DAGGER-CON concrete screws are super easy to use. First, make sure your work area (either wood or metal) is clean and ready to be attached to the concrete. When driving the screw, use a 5/16' hex driver for a good fit. The hex washer head will keep things stable while you're working and also help to seal the connection. Since these screws have deep cutting notches, they should go in with less effort. Just apply a steady force. As for precautions, always wear safety glasses to protect your eyes from any debris. Don't use these screws in applications that require a higher strength than what low carbon steel can provide. To keep these screws in good condition, store them in a dry place. The blue Dagger-Guard coating helps with corrosion, but if they get wet, dry them off quickly to maintain their long - lasting quality.