The original mini-HMS carabiner has been redesigned to be ultralight. Through a series of scientific calculations the ATTACHE 3D has been reduced to a mere 55 g by removing all unnecessary material while maximizing the strength. The new 3D shape offers the versatility of the original ATTACHE for use in a wide variety of situation while reducing the mass and increasing the gate open strength. The rope bearing surfaces have been optimized to balance fluidity with a minimum of excess weight. Overall the ATTACH 3D combines the versatility of a mini-HMS carabiner in a compact, light frame for fast and light adventures.