All, Sorry, the hyperlink didn't show up on my posting. For info on Sturkey blades, the website is: Bob Robert (Bob) Chiovetti, Ph.D. Independent Consultant for The Science, Technology and Industrial Sectors 132 North Elster Drive Tucson, AZ 85710-3212 USA Tel./Fax 520-546-4986 Member, Arizona Small Business Association - ASBA