Made of high quality, weather-resistant stainless steel The iconic S-Biner design allows quick and easy attachment using its unique double-gated design This ultra-handy accessory with its dual spring gates will hold, secure, and connect everything from keys to water bottles to gear Smaller-sized S-Biners are excellent for connecting 2 zipper sliders on backpacks, duffels, and suitcases Available in a variety of sizes that are individually weight rated