SCHLAGE F51A GEO 619 - GEORGIAN ENTRY K4 SATIN NICKEL - 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 T - EQUAL TO 9018904