Bravo Trango! This superlight locking carabiner is lighter than most regular carabiners. How did they do that? Well, to start with, it is smaller than most biners, approx 2/3 size. Specs are still an acceptable 24Kn major, 7kn minor and 9kn gate open strength.
This biner rocks. Smooth gate opening with a regular gate configuration (not a keylock) and of course a screwlock. The only caveat is obviously to be expected: gate width open measures 17mil., and the corresponding space inside is small as well. Although this may deter some climbers who strictly aid climb and want the wide open space a big HMS will provide, for the rest of us aging heavy climbers, the weight savings alone is enough to buy 3 or 4 of these. Clipped to your harness, you'll never notice them until you look for them.