Usage Tips:1. THICK MATERIALIt is made of high-grade 201 stainless steel, with a polished brushed surface treatment, good acid and alkali resistance, the stainless steel self closing hinge is not easy to rust, with strong load-bearing, and long service life. 2.EASY TO INSTALLSaloon door spring hinges and matched screws. Safe working load is 16.5 lbs per hinge and the self closing door hinges fit door thickness is 0.78-1.2 inches. 3.TWO-WAY OPENINGThese double swing door hinges provide both direction opening. Their usefulness in opening 180 degrees outweighs the inconvenience of avoiding the swing back. Easy to adjust the spring tension to control the closing speed you want and no more slam noise. 4.WIDE APPLICABLE SCENESOur double action door hinge is widely applicable to various material doors including wooden or metal saloon doors, cafe doors, bar counter doors, pub swinging doors, kitchen doors or free gates in the shop and mall.