At just 52g the Shadow is was the lightest locking karabiner in DMM's range*, it remains very light.
It's an I Beam Offset D, with a keylock nose making it perfect for rigging or where you want a runner to be extra secure.

Closed Gate Strength: 24K
Open Gate Strength: 9KN
Karabiner Weight: 52g

*they make, and we stock the Phantom screwgate at just 41g