Written for the fire service, this book is a comprehensive manual on making entry "Through the Lock". Topics include bypass techniques, bumping locks, picking locks, K and A tool usage, drilling cylinders, residential and commercial electronic access techniques, specialty keys, and much more. Written for firefighters by a firefighter and locksmith, it contains material passed down from generations of our elders and members of the locksmithing community to make our job easier and more effective when trying to make entry into both residential and commercial structures.