Boat Hook Mooring Cover Support Plate Crown & Webbing Straps Combine a Sea-Dog Boat Hook with the Support Crown and mooring cover support crown straps (#491115-1) for the perfect solution to nature's pooling pressures. Boat Hook Mooring Cover Support Plate Crown Features: * Fits the tip of an adjustable boat hook (or any universal threaded device) to support a mooring cover or canvas top * Helps eliminate pooling from rain, sleet or snow * UV resistant injection molded nylon construction Webbing Straps These Mooring Cover Support Crown Webbing Straps are used for positioning the Mooring Cover Support Crown (491110-1) securely in place. Includes three 15' straps, with a securing loop on one end and an adjustable snap clip on the other. They are designed to set once and then simply clip in and out later for ease of use.