"grooves for chains and straps marine fender"

Tugboat Roller Fenders - Round Hollow Chamber Heavy-duty rubber fenders designed for marine vessel protection with round hollow chamber construction for easy installation and secure mounting. Key Features Strong and durable structural design Integrated grooves for chains and straps for secure attachments Round hollow chamber for simplified installation Designed for mounting on sides, bow, and stern of tugboats Ideal for protecting tugboats, workboats, icebreakers, and various