To me, the grooves on the shaft seem to be spiral threads. Then the ring would have complementary threads inside and can be moved up and down like a screw on a bolt. Haven't figured out why, or what the object is, but nobody's suggested the screw/bolt idea yet.
Robin P. Los Angeles, California, USA [email protected] - To unsubscribe send email to [email protected] containing the line: unsubscribe lace [email protected]. For help, write to [email protected]. Photo site: http://community.webshots.com/user/arachne2003
