Lightweight carabiners like the Petzl Ange reduce the amount you have to carry up the rockface, the longer the route, the greater the savings.. . The ANGE L carabiner is light (34 g): it is ideal for reducing weight when climbing. It is also useful in alpine conditions for those looking to maintain comfort and maximum strength while limiting their weight to a strict minimum. Petzl's MonoFil Keylock ensures smoother opening and closing of the carabiner and a much longer lifetime compared to traditional wire gate carabiners. The wire gate is protected from lateral rubbing (against rock, etc). The unique H-profile allows an optimal size and strength-to-weight ratio. The indent on the bottom of the ANGE S and ANGE L carabiners helps keep the sling in place so that the sling is properly positioned on the carabiner. The surfaces that come in contact with the rope and with the anchor are wider, favoring passage of the rope and reducing carabiner wear. The nose of the carabiner has a hole that allows ice, snow or dirt to be cleared out. The deflector works with the shape of the carabiner to allow proper positioning of the carabiner on its major axis.