Last night, my oldest daughter told me that her science assignment was to explain how inclined planes are used in keys.  She had researched it, and described how the pins go into the cuts on the key, and of course I had to supplement her education with TMI about shear lines, master pins, bitting lists, etc.

I love master keying!  I’m sure I drove our locksmith crazy (Hi Louise!), asking if I could help in the shop.  One day one of my coworkers (Hey Don!) taught me how to shim a cylinder, and I was a natural!  I shimmed my first cylinder while answering a code question on the phone.  🙂


I admit (despite my immediate love of keying)…keying terminology can be confusing.  So we made a whiteboard animation video to help explain some of the common terms.  Enjoy!

The rest of our whiteboard animation videos can be found on the Allegion Training page, or on the Videos page of

What other topics would you like to see addressed in future videos?

Key animation by Stian Berg Larsen.

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