Sea-Dog Boat Hook Three Sided Bristle Brush - Medium Bristle. 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 Features of Sea-Dog Boat Hook Three Sided Bristle Brush Fits all Sea-Dog boat hooks and all universal threaded devices Side bristles make it easy to clean in hard to reach places Soft bristles are safe for gelcoat paint and plastic windows 10.5" head width 3.75" head depth Package Contents: Sea-Dog Boat Hook Three Sided Bristle Brush Sea-Dog 491080-1: Boat Hook Three Sided Bristle Brush - Medium Bristle