The iconic S-Biner design allows quick and easy attachment using its unique double-gated design. The high-quality, durable stainless steel body is available in a variety of sizes that are individually weight rated, creating a perfect way to hold, secure, and connect everything from keys to water bottles to gear.Made of high quality, weather-resistant stainless steel, 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 two zipper sliders on backpacks, duffels, and suitcases. We know that one size doesn´t fit all, so we´ve designed six different sizes so you can choose the right size for the task at hand. We´ve found that the smaller sizes work great for hanging smaller items from a purse or backpack strap, attaching to individual keys, or hanging a plant from a ceiling hook. The larger sizes work great for bigger jobs like hanging a paint can from a ladder or a tool to your tool belt. But, the list goes on and on. We think Backpacker Magazine said it best when they wrote "Don´t ask yourself if you need this useful little widget. The question is: how many?"