Skene bow chocks provide a smooth lead for your mooring or dock lines minimizing chafe. The tips of these chocks are designed to overlap preventing the motion of the boat from causing the line to accidentally work free of the chock. Left and right skene chocks included. Constructed of chrome plated die cast zinc they are recommended for fresh water applications. Accommodates lines up to 5/8. Installs with two #10 FH fasteners (not included).