The Crusin' bird toy is wonderful bird toy for large birds that chew rope, and it is now refillable. On the top are four quick links that can easily be opened with pliers, parts replaced, and closed back, and you instantly have a new toy! Everything on this bird toy is hung with chain, and every chain has a solid welded ring at the bottom. The center is a very hard, solid hardwood cube, that is almost impossible to destroy. There are four strands that have really fun plastic chunky transportation vehicles, cool stars, gear rings, spin wheels, pacifiers and natural wood slices for lots of shredding and chewing fun. Always a favorite with my large birds!