- Educational Material
- Basic Master Pinning CD
Buy This Easy to Understand Primer On Basic Master Pinning
Here, in .pdf format and on a single CD-ROM, is valuable beginner's information covering the subject of master pinning, otherwise known as master keying. This explains the principles of how master and sub-master keys work within a pin tumbler lock, and how to control master systems of any size by knowing how to pin up your cylinders.