Attaches quickly to most standard oar shafts with an easy to install adjustable bolted clamp. Recommended for freshwater use. Zinc plated steel construction.ZINC PLATED STEEL CLAMP-ON OAR LOCKS (SEA-DOG LINE)SKU: 1.00355E+13$21.77PriceQuantity*Add to CartFeaturesDescriptionHeavy DutyA1/2"B2"