Sea-Dog Stainless Steel Skene Bow ChocksInvestment cast 316 stainless skene bow chocks provide a smooth lead for your mooring or dock lines to minimize chafing. The tips of these bow chocks are designed to overlap, preventing the motion of the boat from causing the line to accidentally work free of the chock. Sold in pairs - left and right skene chocks included; Installs with (2) #10 FH fasteners (not included); Accommodates lines up to 3/4"; Dimensions: A: 4-1/2"; B: 13/16"; C: 11/16"; D: 3-5/16";