The R56-1010 Chrome Plated Die-Cast Concealed Power Spring Cartridge Hinge with Hardware Kit Provides a Clean, Concealed Appearance on Cabinets and Reach-in Refrigerators and Freezers. Standard Power Spring Hinge is Designed for Doors Weighing Less than 60 lbs. The Cushioned Stop at 115 Degrees Absorbs Shock, Eliminating Damage to the Door, Frame and Adjacement Equipment. The Hold Open Dwell at 90 Degrees Supports Easy Product Stocking and Self-Lubricating Bushing Provides Silent and Smooth Operation