Whether for home, farm, builder or industrial customers, National has all the right hardware in the sizes and finishes you need. With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. A top quality line of gate hardware designed for long life and maintenance free operation. Smooth Black finish with excellent corrosion resistance because they are triple-protected with zinc-plate, Black finish chromate dip and Black finish baked on enamel finish.