Stainless Steel Carabiner SUS316 Craft Supplies, Handmade Supplies, Handcraft Supplies, DIY Materials, Resources, Components, Parts, Metal Keychains, Straps Can be used to hang cage keys and toys. Made of stainless steel, so it's safe for birds to lick. I used it as a key for a birdcage. Please refrain from purchasing if you are concerned. Also, please understand that there may be some remaining dirt that could not be removed. Simple packaging with only waterproof measures. #kurozuanCrafts