Thanks to all for your collective knowledge! I guess the trick is just knowing the name - "multi-anvil micrometer" Two sites people suggested as sources: $80 (& up) http://www.use-enco.com/CGI/INLMK32?PARTPG=INSRAR2 $45 (& up) http://shop.store.yahoo.com/jehaltools/unmulmic01.html -Mark
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