1、The screws are made of quality aluminum alloy material, such material provides strength and offers good corrosion resistance in many environmental conditions 2、Ideal application for confined ares where the head needs to be flush or below the surface 3、Fixing component, industrial and construction fasteners 4、3 screws length in 3 different colors for your selection 5、Used widely in the home and office appliance, communication equipments and other machinery industry