The stainless steel screws in this set are self-threading, ideal for use in sheet metal with pilot hole and won't rust or corrode. These Philips drive steel screws come in an organized storage container with a chart for easy identification. The steel screws included in the set have oval, flat and pin heads. Stainless steel screws won't rust or corrode Self-threading, ideal for use in sheet metal with pilot hole Oval, flat and pan head Philips drive Organized storage container with chart for easy identification 11A6E