Locksmithing/Schlague M-45


This lock is on an inside-outside door. I would like to modify it so the key knob is on both the inside and outside of the door. That is I would like to lock the door so no one can open it from either side with out the key. Can this be done. Presently the key knob is only on the outside.

The M45 is not the lock model.

We would need to know if it is an A line, D line or residential lock.

The function you want is often referred to as the asylum functin.

D line locks and some A line locks can be converted to this function.

Check out the Schlage service manuals online for what parts are required.



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Dan Terrigno


I can answer questions about commercial locks, card access systems, locksmithing except for cars, safes & safe opening, video surveillance and master key systems


35 years as a locksmith, security system designer and installer, trouble shooting and repair of all manner of security related equipment

Associated Locksmiths of America, Safe & Vault Technicians Association

Attended Miami University, Kent State University, continuing education through the Associated Locksmiths of American

Awards and Honors
Certified Master Locksmith. Certified ALOA instructor.

Past/Present Clients
Numerous Fortune 500 companies, DOD, and other governmental agencies

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