Deadbolts are used in conjunction with exterior door knobs and door levers. A single cylinder deadbolt is operated with a key on the exterior side of the door, and a turn-tab on the inside of the door.Affordable single-cylinder deadbolt by Designers Impressions, a customer-focused brand dedicated to providing the finest quality decorative door hardware, door knobs, and door levers at competitive prices.KEYING OPTIONS: This deadbolt will be keyed alike with any other Designers Impressions keyed locks on your order. Grade: Grade 3 (Residential Use)Color/Finish: Satin BrassKeyway: Kwikset KW1 5-Pin KeywayLatch: Adjustable 2-3/8" to 2-3/4" BacksetDoor Thickness: 1-3/8" to 1-3/4"Mechanical Warranty: LifetimeFinish Warranty: 15 YearsHardware Included: Strike Plate, Latch Plate and Matching Screws