a hook for holding objects together

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A common hook for holding objects together is a "carabiner" or "carabiner hook." It is a metal loop with a spring-loaded gate that allows it to be quickly and securely attached to various objects. Carabiners are commonly used for holding keys, water bottles, camping gear, or even climbing equipment.

If you're looking to purchase a carabiner, you can find them at most outdoor and hardware stores. They are available in different sizes and materials, such as aluminum or stainless steel, depending on your specific needs. Be sure to choose a carabiner that is rated for the appropriate weight or load capacity to ensure durability and safety.

Alternatively, if you're unable to purchase a carabiner, you can consider other makeshift hooks like sturdy twist ties, bungee cords, or even zip ties. These items can be looped and secured around objects to create a temporary hook for holding them together. However, it's important to note that makeshift hooks might not provide the same level of strength or security as a purpose-made carabiner, so you should use them appropriately and not for heavy-duty applications.