Nite Ize has brought innovation to the traditional carabiner. This lightweight, colorful aluminum carabiner ditches the traditional bulky tubular construction for a cross sectioned, rectangular body that's low profile and slim to feed more easily through small openings and rests flat in pockets. It also features an innovative slide to lock design that securely locks the gate with a simple push and slide movement, and unlocks when you want just as easily. The #3 size is great for carrying smaller items like keys, and for attaching to zipper pulls.