Standard racking carabiner
These are a standard for racking trad gear on your harness. They help keep jumbles of stoppers, slings, cams, etc., organized and accessible. The wiregate shaves some weight off a rack versus a solid gate oval. To my knowledge, the only other wiregate oval on the market is the Omega Pacific Doval.
Ovals are also typically used in aid climbing, but since I don't aid, I can't comment on the BD's performance for that purpose.