The iconic S-Biner® design allows quick and easy attachment using its unique double-gated design. 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.