SeaSense Oar Lock Sockets For 1/2-Inch Oar Locks Go to amazon.com Related posts Top 6 best oar locks FeatureZinc Plated Steel Oarlock Socketsaccepts any oarlock with a 1/2" shankEasy to install sockets DescriptionThe SeaSense oarlock sockets accepts any oarlock with a 1/2" shank. Our oarlocks are made of Zinc plated steel.