National Mfg. N185-199 V521 3-1/2 Inch Commercial Brass Adjustable Full Mortise Spring Hinge Product Description 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. 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. Features 3-1/2 Inch Brass Adjustable Spring Hinge, 1/4" Round Corner Designed For Hanging Self Closing Doors In Basements, Stairways, Garages Entrances Can Be Used In Residential, Commercial Apartment Buildings Closing Speed Is Adjustable Fits Standard Hinge Cutout, 1 Per Pack USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.