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rectangular is most certainly the correct cross-section
the alternatives could be triangular, or some sort of round (not sure i've seen abrasives in hexagonal or octagonal)
at least all my hones are rectangular in cross-section :)
looks like it's a no go, though. somebody buy lee a beer for all his worn checking (and send it my way since he's a teetotaler).
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Something odd there. First, they don't look norton combo waterstones. Second, even if you bought 5 at a time, the price is way too low.
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Here are some other options.