Payment #7 of8 Institutional Locksmithing Online Course (Commercial Locksmith Lessons 1-8). It includes theprinted book that comes with these lessons.

COMMERCIALLOCKSMITHING
Lesson 1 Door Closers
Lesson 2 Panic Bars and Exit Devices
Lesson 3 Basic Electrical Components
Lesson 4 How to use a Multimeter
Lesson 5 Electric Strikes
Lesson 6 Electromagnetic Locks
Lesson 7 Electronic Access Control Devices
Lesson 8 Master Key Systems
Glossary of Commercial Locksmithing Terms