Kwikset 663 3 RCL RCS 663 Single Cylinder Polished Brass Single-Sided Deadbolt none Imported For use on exterior doors where keyed entry and security is needed Deadbolt operated by thumb turn on interior, no trim on exterior Latch includes round corner faceplate Ansi/bhma grade 3 certified Includes 2 3/8 in. Latch backset