PETZL - Ring Open Multi-Directional Gated Ring for Climbing INTENDED USE: The RING OPEN gated ring is designed for semipermanent connection of equipment. SIZE AND STRENGTH: This carabiner has a 11 mm gate opening and a major axis strength of 23 kN. EASY TO USE: The wide opening makes it easy to use on a variety of ropes with sewn terminations. DESIGN: The round shape ensures optimal functioning in all directions. WEIGHT: The RING OPEN gated ring weighs 70 grams.