http://home.earthlink.net/~icores

This connection to Mr.Lynk's Web-site will allow you to learn more about I-Cores, and also to purchase his definitive books about these types of locks.
We offer our sincere thanks to William M. Lynk for requesting we make the I-Core Tension Tool and for assisting us in our task by providing us with a diagram that was similar to Gerry Finch's original tool.  His information provided a useful starting point in our efforts.  Mr. Lynk is the author or "Interchangeable Cores: Small Format 2000" and "Removable Cores: Large Format 2002."  Both books are being published through The National Locksmith, with the "Large Format" book expecting to be released during the winter of 2002-2003. For more information on I-cores.