UNION C-Series 3G135 Security Detainer Deadlock

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The 3G135 is part of UNION's C-Series.  This series of locks replaces the old Chubb locks, in this case this is a replacement for the Chubb 3G135 Detainer Lock.The Detainer type of lock offers a lot more key combinations than a typical lever lock, and is therefore considered superior to its equivalent lever type locks.  Further to this, t..