This is an authentic replacement part sourced directly from the manufacturer. The screw is commonly found in Ryobi miter saws. This part is made of metal, and is generally used in securing the pivot plate in the guard assembly. Please be aware that there are different screws used in the machine. Refer to the parts diagram to be sure o...Read moref ordering the correct part. You may require a wrench when replacing this item. The screw is provided as an individual replacement part.