For residential single and multi-family entrance doors. Deadbolt thrown or retracted by key from outside or by inside turn unit. Latch retracted by thumbpiece from inside or outside grip. Solid forged brass outside trim, wrought brass trim rings with concealed security inserts. Wrought brass inside trim. Wrought brass cylinder trim rings reinforced by tapered die cast security insert for resistance to wrenching or prying. Ultima Lifetime Anti-Tarnish finish on all exterior parts.