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. Bar holders are made from zinc-plated steel for durability and longevity and added strength desired for barred applications. Smooth black finish with excellent corrosion resistance because they are triple-protected with zinc-plate, black chromate dip and black baked on enamel finish.