For residential single and multi-family entrance doors. Unlocked or locked by keyed knob outside or turn button knob inside, emergency exit feature, no unlocking required for panic exit, inside knob always unlocked. 1-Piece knob for increased security. Solid brass trim and all metal parts. Wrought brass exposed trim. Pressure cast zinc tubular lock housing. Key removable outside knob for easy cylinder replacement. 3-Piece assembly. All locksets have the same finish for both interior and exterior parts. Door prep 2-1/8 in crossbore, 7/8 in or 1 in edge bore, 1 in x 2-1/4 in latch face, 1/2 in throw standard. Door thickness 1-3/8 to 1-3/4 in. Cylinder 5-pin tumbler C keyway with nickel silver keys (2). Faceplate 1 in x 2-1/4 in. Strikes of Full lip, 1-5/8 in x 2-1/4 in, no box. Bolt 7/8 in housing and 1 in throw. ANSI/BHMA A156.2-2011 Commercial Grade 2, ANSI/BHMA A156.39-2015 Residential Grade AAA and available UL listed for 3-hour fire door. Latch 1 in x 2-1/4 in, 1/4 in radius corner faceplate, 7/8 in housing diameter, 1/2 in throw, circular drive in included, universal latch. BACKSET Dual backset latches, fits either 2-3/8 in or 2-3/4 in backsets.