This will be a change of methods. However, with some deletion of faces, copying them, moving them, and extruding them, you will soon have an oarlock:
Open a new file in Blender.
Press X to delete the default cube.
Make a cylinder. In the Tool Shelf, set the radius to
0.083like the shaft of the oar, as seen in the following screenshot:
Change to the Top view, Ortho mode, and zoom in to the cylinder.
Press A to deselect the cylinder. Press Shift + A, and select Mesh and then Torus from the drop-down menu.
In the Tool Shelf, set the Major Segments to
18and the Minor Segments to12; then, set the Major Radius to0.13and the Minor Radius to0.035. This is shown in the following screenshot:
Press the Tab key to get into Edit Mode. Choose the vertex select mode from the 3D View header.
Make the Limit selection to visible button on the 3D View header light gray so that you can select all the vertices.
Deselect all the vertices. Press B for the border select tool to...