I am trying to source a 38cm metal blade for a lawnmower where the manufacturer has stopped producing spares. Is it possible to get the diameters of the three fitting holes (should be one large and two small) and the measurement from the central hole to one of the outer holes? Sorry to ask such a nuisance of a question, but I've bought and returned a blade elsewhere because it looked identical but the fitting holes where not quite the same size. Many thanks for any help you can offer.