Sea Dog Stainless Steel Open Base Boat CleatSea Dog 316 Stainless Steel Open Base Cleats provide easy line tie-off and corrosion resistance in a classic style. Four thru-bolts are required for installation (not included).Dimensions:Part NumberABCDFastener041604-14"15/16"1-3/4"1"#10 FH041605-15"1-1/8"2-1/8"1"#10 FH041606-16"1-1/4"2-1/4"1-1/8"1/4" FH041608-18"1-1/2"2-13/16"1-3/8"1/4" FH041610-110"1-7/8"3-5/8"1-3/4"5/16" FH