The Più 2 has been specially designed for compatibility with single ropes, half ropes and twin ropes. Simply clip a carabiner in (specifically designed for the CAMP HMS Nitro and HMS Compact carabiners) and use it as a lever to gradually release tension. The teeth have been optimized for a wide range of rope diameters so climbers can use the same device whether they are rapping fat single lines or catching falls on skinny twin ropes.