CodeLocks CL615 Mechanical Lock Heavy Duty Optional Backset Tubular Latchbolt Double Sided Passage Function Optional Cylinder Prep Optional Finish Grade 2 Finish:Brushed Steel the buzzer beeps once if the buzzer beeps once if the key cannot be detected for more than 10 seconds Futura Pro One features fully guided key cutting procedures and compact dimensions making it the ideal tool for inexperienced key cutters and locksmiths who provide home repair and installation services and require a lightweight machine As well as existing CL200 Typically most mechanical digital locks require the lock to be removed from the door or partly disassembled to change the code