for easy manipulation...
Keylock is an extremely simple and ingenious locking system that solves the problems associated with the traditional design of carabiners. It eliminates any risk of ropes or tapes becoming entangled in the lever or in the carabiner shell when it is being connected or released. Neither the gate, which is completely cylindrical, nor the nose has any sharp edges. Ropes and slings do not, therefore, come into contact with any cutting edges.