Following our mantra that no product is too small or basic to be improved, we have once again brought Nite Ize innovation to the traditional carabiner This lightweight, colorful aluminum carabiner ditches the traditional bulky tubular construction Features 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 our 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 These are available in three sizes: #4 (perfect for attaching to a belt loop or backpack to carry larger items), #3, and #2 (both are great for carrying smaller items like keys, and for attaching to zipper pulls) Lightweight, strong with 4.5 kg weight capacity Solid aluminum body construction Stainless steel gate with slide-to-lock mechanism