Some of the metals are not bird safe. The clapper in the bells are not attached so that they can take the rough play. Those beaks can break the clapper from the bell in record time. Also some of the clappers are made from lead. Many toys say they are for Amazons but the bell is not strong enough or big enough to withstand Amazon assaults.
Some bells are dangerous at the top where they attach to a chain.
The space where they attach is a size where a toe or beak can get stuck. The bell is well made and right for Amazons but the method to attach it to the cage can pierce through a foot or beak. Amazons love bells. They love to shake them and make deafening noises with them. It is a shame that a toy they love so much could actually hurt them.