For professional needs such as small apartments, restrooms, small offices, etc. Specifically designed where basic security needs or specific codes must be met, but usage is low to moderate. Unlocked or locked by keyed lever outside or turn button lever inside. Emergency exit feature, no unlocking required for panic exit, inside knob always unlocked. The knob for better security and appearance. Solid brass trim and all metal parts. Pressure cast zinc tubular lock housing. Key removable outside lever for easy cylinder replacement. All locksets have the same finish for both interior and exterior parts.