Sea Dog Top Mount Oar Lock This top mount oar lock is ideal for light service duty and is recommended for freshwater use. Perfect for aluminum vessels due to its corrosion resistance, this oar lock also features a pin style and round horns that secure the oar in place in all sea conditions. Sold in pairs, this oar lock is constructed of die cast zinc chrome plated material for maximum durability. Features Ideal For Light Service Duty Corrosion Resistant Takes 12 Diameter Oar Lock Shaft Die Cast