Note the lock protector plate with the Medeco lock cylinder on this aluminum framed commercial door.
The protector is designed to prevent a pipe wrench or pliers to ‘wrench’ the Medeco cylinder out of the door.
The protector prevents a ’J’ tool or a ‘double hook’ tool from being used by burglars to unlock the door.
The Medeco M4 lock is designed to defeat drilling as well as non-authorized key duplication or picking.

See how easy it is to pry an unprotected lock in the video below:

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