COMPACT & LIGHTWEIGHT: The "Small D" (Sm'D) design offers the functionality of a D-shape carabiner in a significantly lighter and more compact package (41-55g). TIBLOC KEEPER HOLE: Features a small, dedicated hole in the spine that allows you to tether a TIBLOC or MICRO TRAXION to the carabiner with a cord, making the system loss-proof. D-SHAPE EFFICIENCY: The asymmetrical D-shape guides the load to the major axis (23 kN), making it perfect for belay devices, pulleys, and lanyard ends. NON-LOCKING OPTION: The "WALL" version (M39A S/SN) features a non-locking straight gate, specifically designed for aid climbing and easy clipping during progression. SNAG-FREE KEYLOCK: All versions feature a Keylock nose (no hook) and a fluid interior design to prevent snagging on webbing, ropes, or bolt hangers.