http://cataractoars.com/component_options.html the razor blade are the ones I tried that really balanced the oars out nicely on a 9' overall length. The best oarsman I know uses the magnum blades and says the extra money spent on anything else is a waste. Buy the best once and be done with it smile
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We have reached the time in the life of the planet, and humanity's demand upon it, when every fisherman will have to be a riverkeeper, a steward of marine shallows... We are beyond having to put back what we have taken out. We must put back more than we take out. Tom Mcguane