I installed this on my full glass storm door wanting a little more than a standard crash/wind chain. It's a good quality crash chain, and came with all the needed components including a spring... but it was not any more heavy duty than the ones you'd buy at Home Depot, Ace, or True Value. This crash chain will probably save my full glass door from a light breeze, but it will be no match for strong winds. I should have purchased a stronger/bigger chain, but then you have to put. up with the ugliness and chain hang down factor. This was a good compromise.