Guides and Mountaineering instructors wanted a simple solution to help transfer their knowledge and experience to their clients, simplify systems, and take out confusion at belays. With DMM'ssmall batch, in-house production DMM were able to provide that solution. DMM has taken DMM'sbest loved Shadow, Boa, and Oval biners and colour coded them. Red, Blue, and Green: they sound different - even in a wild mountain environment, and they look different - even in poor light. Not only suited to the mountain professionals, climbers of all abilities wanting easy identification will benefit. This is a high performance, lightweight locking biner suitable for a wide range of themes, from trad climbing right through to winter climbing. Think of it as a bigger version of the Phantom. The extra gate opening and larger size make it easier to theme if you are wearing gloves. And despite these advantages it still hangs lightly on your rack.