Metal snap hooks, set of 13, perfect for cage locks and leads. In my experience with breeding parakeets, they were all escape artists, so they were always running loose. Since it was indoors, it wasn't a problem, but there were many that didn't get along, and there were cases of missing claws or serious injuries. The cockatiels were fine, but the conures, Mexican, and white-bellied parrots, etc., were difficult, so I bought these to lock everything up. I bought large ones so they could be used on large cages. They are used, but they are still in good condition. Original price: ¥840 each Purchased from Monotaro for ¥549 each. There are 13 in total. I still use many of them, but I'm offering the extras. Normally, it would be ¥7137 + shipping from Monotaro, but I'm offering them at a bargain price! - Quantity: 13 - Material: Metal - Type: Snap hooks - Uses: Can be used for cage locks and leads - Size: Approximately 5cm Thank you for looking.