The Hex washer-head self-drilling steel metal screws are a powerful tool to have in your arsenal when performing metal-to-metal fastening. They deliver superior performance with a faster drive time and stronger pull-out rating. Made of high-quality steel and are specially heat treated. Drill point has been incorporated into the screw in the familiar twist drill design. These screws drill their own hole, form mating threads fasten securely. Can be used in steel, plastics, composite materials, wood plus various laminates. No pre-drilling is required. Great for general household repairs, renovations, improvements, and DIY projects, the sharp threads of these screws draw materials together and ensure a secure hold.