The DMM 4CU's light weight is a noticeable advantage when packing in or climbing with a full rack. An average 20% weight saving means that the climber can "sew up cracks" with a much lighter rack. Another way of looking at it is that climbers can place 20% more cams, feel much more secure, and still come out even on the weight. Less weight with more protection ... who wouldn't love that?Each cam is rated to 14 kN in the active, working position with the quick release sling doubled, and 12 kN with sling fully extended. The passive strength of the cams, resting on their stops, is 10 kN.