There is still nothing quite like the Alien from Fixe Hardware, and the Alien Revolution Double Sling is an improvement on an already great design. They are 20% lighter than standard Aliens, with improved components and a narrower head width. These little babies are great for aid and free climbing alike; and are perfect for pin scars and thin cracks. They feature stems that are very flexible in all axes, narrow head widths, and soft alloy cams with a large camming angle and a very innovative trigger design that works beautifully and is very durable. A double sling serves to extend placements and reduce "walking."