(2) 4" Adjustable Double Action Spring Hinge Saloon Swing Door with Screws Black Double action hinge for swing doors, both direction opening; Permits doors to open in either direction and automatically return to closed position. Provides maximum protection for doors subject to normal abuse of lift trucks, due to resiliency of spring support and shock absorbing reaction of flexible mounting. Adjustable spring tension permits power and speed adjustment of each size spring hinge. Super fast shipping from USA !