C.E. Smith 1-1/2" Wide Keel Base Roller Assembly f/2" - 2-1/2" Tongue [32100G]1 1 2" Wide Keel Base Roller Assembly f 2" 2 1 2" Tongue Product Description This roller assembly supports your boat's keel for easy loading and safe transport on your trailer. It features a 4", black rubber spool roller and a galvanized steel bracket that attaches to your trailer's tongue. 2 to 2 1 2" trailer tongue. Features: Spool roller supports your boat's keel as it sits on the trailer Prevents the bow from making contact with your winch Eases