DMM Phantom Gunmetal

Being super light is not the whole story though. You also need to find the optimum balance between size, strength and weight.
Sure, they could have made this biner smaller, and as a result, lighter, but there comes a point when a tiny biner becomes a key ring – too fiddley to hold. Functionality is just as important as weight. At 26g the Phantom is astonishingly light.