Injection Molded Polypropylene Fiberglass/Machined Bronze. The Garboard Wrench has multiple deck keys and will also fit Garboard "T" style plugs. Includes one replacement plug stored in handle. Sea-Dog Line is a 3rd generation family company with a history of satisfied customers stretching back to the company's start in 1933. The company is the recipient of multiple industry awards for quality and efficiency.