Thank you for viewing. Please consider purchasing only if you understand that this item has been stored for a long time. I stored this item without knowing its exact use. I believe it is a "cord stopper (cord lock)" type, used to secure items by passing a string or cord through it. There are several shapes and sizes mixed together. Material: Plastic Color: Black Quantity: All items in the photo (4 types, sold as a set) I am not familiar with how to use it, so I have not performed any operational checks. Please purchase only if you understand this point.