COOL EDUCATIONAL/PRACTICE/VISUAL AID - SEE-THRU KEYED PADLOCK
Here is something pretty awesome . . . a padlock with an entirely transparent body that reveals all. This is the perfect visual aid if used for a teaching tool, and just as handy as a practice lock because, as you attempt to pick it, you will be able to see how the pins in the lock react to your process. Surprisingly affordable, too!