Cataract KBO 2-piece Oar Shaft with Wrap
These shafts have an innovative feature. The end of the handle is notched. Placing your thumb in the notch lets you know the orientation of the blade without taking your eyes off the path ahead.
Cataract SGG Counter Balanced Shaft with Rope Wrap & Stop
You don't have to know rocket science to row a boat, but it helps to have gear made by a company who does. Cataract shafts are made with the same filament wound glass/carbon/epoxy composite technology used by the aerospace industry.