Access by combination for outside key bypass Will accept Interchangeable Core for Best, Falcon, Eagle, KSP, and Arrow ; Less core ; Recommended for high traffic security sensitive applications ; The all-metal 1000 Series is U.L. Listed for A label doors ; 1/2'' deadlocking solid brass latch locks automatically when the door is closed ; Thousands of changeable combinations ; Latch and hand are reversible on-site ; Allows free egress at all times ; No electrical wiring ; Door Thickness: 1-3/8'' to 2-1/4'' thick ; Deadlocking Latch: 1/2'' throw ; Backset: 2-3/4'' ; Lock Body: 7-3/8'' H x 3-1/8'' W x 3-13/16'' D ; Latch Front: 1-1/8'' x 2-1/4'' ; Cross Bore: 2-1/8'' ; Finish: 26D (Dull Chrome)