Sea-Dog Hook To Lock Button Accessory Adapter Boat. Designed with UV resistance this adapter allows the Sea-Dog boat hook to be used with Shurhold and other accessories that have a lock button attachment system. Accessories not included. Specifications for Sea-Dog Boat Hook To Lock Button Accessory Adapter: Manufacturer: Sea-Dog Color: Black Features of Sea-Dog Boat Hook To Lock Button Accessory Adapter Allows the Sea-Dog boat hook to be used with Shurhold and other accessories that have a lock button attachment system Fiberglass-filled injection molded nylon construction UV resistant Universal / ACME thread Size: 3.5" Length x 1" Diameter Package Contents: Sea-Dog Boat Hook To Lock Button Accessory Adapter Sea-Dog 491060-1: Hook To Lock Button Accessory Adapter Boat