Just when you thought a classic had no room for innovation, along comes Nite Ize® SlideLock Carabiner. Changing the game for carabiner expectations, Nite Ize SlideLock Carabiners have an innovative slide-to-lock system for secure gate locking with an effortless push-and-slide motion. These carabiners further improve on standard models with a flat design that's more practical than ordinary, bulky, tubular versions. The flat style fits in pockets and other storage compartments more easily and feeds better through smaller openings. Stainless steel construction for long service life. Manufacturer model #: CSL4-01-R6. Slide-to-lock secure gate locking system; Flat, slim design; Fits better in pockets; Stores more easily than standard models; Stainless steel;