These wrist lanyards are built to potentially save your life in times of distress. Loop the lanyard onto any tool you use while diving. Dive lights, Lobster gauges, Clam gauges, Ab Irons, and the like. Cinch around your wrist. If your tool becomes stuck in the reef or structure, simply pull your arm or body away with 20lbs of force. The breakaway coupling will disconnect freeing your wrist from the lanyard. Re-useable Finest quality construction