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Posted to rec.crafts.metalworking
Jim Stewart Jim Stewart is offline
external usenet poster
 
Posts: 756
Default Anyone know what this is for?

http://www.grumpyoldgeek.com/images/AL_collar.jpg

Bought it at the flea market for $2 thinking I could
use it for an external lap. Alas, my eyeballs are
out of calibration and it won't work.