To see how combination locks work, see http://woodgears.ca/combolock/index.html http://woodgears.ca/combolock/index.html. The video at the end of the page is pa

To see how combination locks work, see http://woodgears.ca/combolock/index.html http://woodgears.ca/combolock/index.html. The video at the end of the page is particularly helpful.