Payment #6 of 8 Institutional Locksmithing Online Course (Advanced Locksmith Lessons 43-50).
ADVANCED LOCKSMITHING
Lesson 43 Safe Deposit Box Locks
Lesson 44 Opening Safe Deposit Boxes
Lesson 45 Making the First Key and Door Repair
Lesson 46 Safe and Vault Locks
Lesson 47 Basic Operating Principles of Safe Locks
Lesson 48 Hole Type Combination Changes
Lesson 49 Key Change Combination
Lesson 50 Combination Lock Theory
