Features: 1.Application Details: Socket is specifically designed for use with 1/2 inch diameter shank oarlocks, suitable for salt water. 2.Unique Design: Mirror polish and plastic bearings prevent rattling while the oarlocis in use, bringing you an excellent use experience. 3.Rust Proof: Durable 316 cast stainless steel construction provides excellent rust protection for use in harsh water environments. 4.High Performance: Oarlock sockets provides more horizontal absolute strength, which is attached to the inside of the gangway wall and screwed on the top and side. 5.Delicate Appearance: Sockets have a smooth surface and exquisite appearance that will maintain its bright look after a long time in the water. Specification: Item Type: Rowlock Socket_x000D_ Material: 316 Stainless Steel, ABS_x000D_ Aperture: 1/2in_x000D_ Mounting: 4 x10 screws to install each socket (not delivered)