Amen to the previous review! Quick links don't work well either for my green wing. Only the biggest, heaviest ones I've tightened with pliers keep him from bending, breaking & unscrewing them. I started using these hangers for the heavy wood chew toys but I've gotten more & use them for everything that will fit over the hook. They seem expensive but after 6 months the only damage is scratches. I consider these absolutely essential for his safety!