The WC Helium is the coolest biner ever, but is expensive and not widely available. WC uses some nice machining to create a hooded, snag-free wiregate. BD just decided to take the Hotwire biner and add a flat wire on the nose, creating a hooded, snag free wiregate. Easy, cheap, and clever. The biner works as advertised... it doesn't catch things when you clip/unclip, just like a nice keylock biner. It is also still very light. I give it two thumbs up.