Sea-Dog Boat Hook Three Sided Bristle Brush - Soft BristleBoat Hook Three Sided Bristle Brush Soft Bristle These three sided bristle brushes fit all Sea Dog boat hooks and all universal threaded devices. Soft bristles are scratch resistant for gelcoat, paint and plastic windows. Side bristles make it easy to clean in hard to reach places. 10 1 2 head is longer than industry standard covering a larger cleaning area. Universal Acme Thread These three sided bristle brushes are suitable for all fur seal hooks