Petzl - ATTACHE, Lightweight Screw-Lock Carabiner for Climbing 1" high 4" wide INTENDED USE: The ATTACHE carabiner's compact shape is designed for multiple belaying uses such as connecting to a harness and belaying with a Munter hitch knot. SIZE AND STRENGTH: This carabiner (24 mm gate) is lightweight (56 grams) and has a major axis strength of 22 kN. EASY TO USE: The H-shaped profile offers an improved strength to weight ratio and the wide contact surface makes it easy to tie and untie a clove hitch knot. LOCKING SYSTEM: The ATTACHE is a Screw-Lock carabiner that offers good handling and effective locking with the additional benefit of a lock indicator. NO MORE SNAGGING: Petzl's Keylock system helps avoid accidentally snagging your carabiner on your gear.