Camden, CX-91S-12, 1200 lbs. Surface Mount Single Door - Basic Magnetic Lock 12/24V, Optional built-in adjustable timer eliminates the need for add-on exit delay timers, Optional lock sensor (bond sensor) monitors that door is secure, Surface and mortise mount models, Holding Force:1200 lbs. Also known as -Camden, CX-91S-12, 1200 lbs. Surface Mount Single Door - Basic Magnetic Lock 12/