PRODUCT DESCRIPTION Removable pin for easier installation, with a five knuckle, full mortise design. For a more finished appearance there's a nib on the hinge. Made with stainless steel heavy-gauge material and countersunk screw holes for a more finished look. FROM THE MANUFACTURER 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. Providing quality hinges for all of your industrial, residential, commercial and specialty needs. With a wide array of finishes and corner options, there's a residential hinge application ideally suited to fit your interior project needs. Utilizing 300 series stainless steel with 18% chromium, which gives the corrosion protection as pure chromium in chrome plating. These products will not corrode or rust when exposed to the weather.