On Sun, 14 Jan 2007 14:02:28 -0600, DanG wrote:
Proper lock installation / orientation has the bitting on the keys
up when you insert the key. This has to do with dust, dirt, and
debris not getting in the pin holes as much.

Thank you DanG for the analysis of why it's best to have the bitting
(teeth) up on the key.

I never knew why, but I never saw any professional install a lock any other
way. It's sort of like installing a three-pronged USA electrical outlet
upside down. The lock will still work but from a professional and esthetic
and functional standpoint, it's subpar to install a left-hand lock knob on
a right hand door.

Thank you for explaining why!