John, American grit ratings for abrasive papers is different to the European standards. > Much of what is written here is equally applicable to the Abel > hammer, though there are a few things I would not accept -- for > example the use of 80 and 120 grit paper for facing the hammers. I > would never go coarser than P 180. The hammers I get from Abel are > not concave at the top as they used to be and I think they face them > up at the factory after cutting, which I am glad of.
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