1、Robust Structure: The durable cast aluminum structure of the oar lock socket is rustproof. They can be adapted to both fresh and seawater harsh working environment. 2、Without Rattling: The oar lock socket is mirror polished and has plastic bearings, which ensures that the socket does not rattle during long term use. 3、Size: Socket bottom length is 105mm / 4.1in, height is 40mm, can be used for 14mm diameter shank oarlocks. Please check that the size matches before buying. 4、Package Including: You will receive 2pcs oar rowlock, and they are one on each side and you need some bolts to attach them to the rails. With simple installation steps, save time and effort. 5、Excellent Alternatives: The cast aluminum structure of the oar lock socket can be used directly to replace your broken, can be fitted closely with the blade, providing good blade support and rotation stability.