A combination lock has a dial that is connected to tumblers inside the lock case. As the dial is turned to the correct combination, the tumblers are aligned and the bolt is released.
<BR><P>
World Book diagram by Zorica Dabich</P>
</BODY></P>
<!-- <PT>YES -->
<!-- <AR>From The World Book Multimedia Encyclopedia (TM) (c) «date» World Book, Inc., 525 W. Monroe, Chicago, IL 60661. All rights reserved. -->