The Atom Lock is a high-strength HMS carabiner designed for belaying and rappelling. The SphereLock nose combines with a large gate opening to make clipping ropes and webbing easy. a High-strength HMS carabiner with a secure screw lock closure a New screw gate is lightweight and easy to handle a SphereLock nose make clipping ropes and webbing easy a Laser etched marking to indicate if the lock is open or closed