The ideal solution for those heavy SCUBA flashlights and Cameras - The locking mechanism allows the flashlight or camera to be secured when on a boat or land. Unlock the unit in the water and the nominal retraction force Gear Keeper will retract the light or Camera (which is somewhat buoyant). You're streamlined, won't snag and it's right where you need it. When using your flashlight or Camera underwater, you won't notice any resistance or retraction force.