Carabiners are a popular way to carry around keys and other essentials. Named for the Coachwhip snake and its S-curved body, this option was designed with keys in mind. It's CNC-milled from stainless steel with matching stainless steel wire gates, and is slimmer at the bottom than the top, letting it accommodate keys without the need for a separate split ring. Available in stainless steel with or without a PVD black or brass coating.