Although this revolver does not have a drum for cartridges, it is not intended to extinguish life, but on the contrary, to provide safety. The DMM Revolver Screwgate is a locking carabiner with a small, integrated rope pulley. This helps to minimize friction and also distributes the forces better in the event of a fall. Ideal for tours with long lengths of rope, zig-zags or rope lengths with many edges as well as for pulleys and crevasse rescue.