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 2 zipper sliders on backpacks, duffels, and suitcases. We know that 1 size doesn't fit all, so we've designed 6 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. Features: High quality stainless steel construction Secure stainless steel wire gate closure Warning: not for use where disengagement could result in bodily injury or property damage, not for climbing Size #5: dimensions: 4.38 in. x 1.93 in. x 0.33 in., 111.41 mm x 49.19 mm x 8.45 mm, weight: 1.69 oz., 48.00 g, weight rating: 100 lbs.