For service or common exterior doors. Unlocked by key from outside. Inside knob is always unlocked. Outside knob is always locked. Bright brass (605) finish. Packaged with a 1" square corner latch. Adjustable for 2-3/8" or 2-3/4" backsets. 2-1/4" x 1-3/4" full-lip square corner strike. Grade 2 construction for superior durability and quality performance. Lifetime mechanical warranty. 10 year finish warranty. Order a case of 20 and you will get 5 sleeves of 4 keyed alike. UL listed.