And then there is the issue of very similar sizes, that by eye you can't=20 tell one size from the other. I find it's necessary to take a know=20 America or Metric nut or bolt and determine which it is. To complicate,=20 some of the equipment around including Ford autos and a New Holland=20 compact tractor have both varieties scattered about. Now should I bring=20 a 10 or 11 mm. or 3/8" open end (spanner) wrench. :) --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .