Kwikset 663SQT Privacy One sided Deadbolt from the Signature Series

One Sided Onesided deadbolts work via thumb turn or key on one side of the door without any keying or unlatching function on the other side. Often times they are used on panic rooms, dark rooms, or storage rooms, but can be installed anywhere that additional privacy or security is needed. Features Constructed of high quality materials for lasting durability Installs easily will all necessary mounting hardware included Covered by a limited lifetime manufacturer warranty Specifications Backset 23/8 Inch Cross Bore 15/8 Inch Edge Bore 1 Inch Door Thickness 13/8 Inch 13/4 Inch Handing Left, Reversible, Right Width 21/2 Inch Height 21/2 Inch Product Weight 0.8lbs Latch Faceplate Square Corner