Carabiner Aluminum Large "D" Shape Key Chain, Polished Aluminum Carabiner Clip. Aluminum CARABINER : Everybody has keys that they need to carry with them, and you want yours to be secure, but convenient. And a key ring can often times communicate personal taste and preferences to those who happen to see it. SPLIT KEY RING : The carabiner attaches to a 1" aluminum double split-ring key ring with a heavy duty double-eyed connector. SHAPE : This polished aluminum carabiner clip is a large "D" shape. SIZE : measures 3 1/4" long and 1 5/8" across at the widest point. COLOR : Red.