The NiteIze S-Biner Dual Carabiner Aluminum #2 The iconic S-Biner design allows quick and easy attachment using its unique double-gated design. The lightweight and colorful aluminum body with stainless steel gates is available in a variety of sizes creating a perfect way to hold, secure, and connect everything from keys to water bottles to gear. With a body made of high quality, lightweight aluminum, this ultra-handy accessory with its dual stainless steel spring gates will hold, secure, and connect everything like keys, water bottles, and gear. The dual independent gates allow for quick, convenient accessibility to your items. Smaller sized S-Biners are excellent for connecting items like keys and clipping to zippers, while larger sizes can be used for organizing the garage and hanging or carrying large items like sporting gear. Our S-Biner SlideLocks are available in three sizes (#2, #3, and #4) for small-to-larger tasks.