For keyed exterior doors. Exterior knob locked or unlocked by key. Unlocked by turn piece on the interior knob. Triple option latch includes: 1/4" round corner, square corner, and 1" circular drive-in latch, adjustable backsets 2-3/8 In. or 2-3/4 In. Strike: 1/4" round corner and square corner full-lip strike. Lifetime mechanical warranty. 10 year finish warranty. Bright brass (605) finish. No. F51AORB605: Finish: Bright Brass (605), Backset: 2-3/8 In. or 2-3/4 In., Latch: Adjustable Latch, Security Level: Grade 2, Exterior Access: Key, Interior Action: Turn Button, Pkg Qty: 1, Package Type: Box Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!