Kwikset 660 Deadbolt, Design: Traditional, Security Grade: 3, Number of Cylinders: 1, Cylinder Type: 5-Pin, Keyway Type: KW1, Key Type: Keyed, Re-Key Technology: SmartKey, Strike Type: Round Corner, Strike Size: 1 x 2-1/4 in, Backset Type: Adjustable, Backset Size: 2-3/8 to 2-3/4 in, Latch Type: Round Corner Adjustable, Faceplate Size: 1 x 2-1/4 in, Throw Length: 1 in, Cross Bore Diameter: 2-1/8 in, Edge Bore Diameter: 1 in, Projection Size: 1-1/16 in Exterior, 27/32 in Interior, Door Thickness: 1-3/8 to 1-3/4 in, Door Handing: Reversible, Commercial/Residential: Residential, Zinc, Satin Nickel, Dimensions: 2-7/16 in H, Includes: (2) Keys

• This single cylinder deadbolt can be locked or unlocked by a key on the outside or the turn piece on the inside
• Features adjustable latch and deadbolt to fit all standard door preparations
• Add to a keyed knob or lever for additional security
• Features SmartKey security, which protects against advanced break-in techniques and allows you to re-key your lock yourself in seconds
• SmartKey® Security™ re-key technology is compatible with Kwikset (KW1) keyway
• SmartKey cylinders feature a stainless steel side locking bar, racks and pins for increased strength and security
• Patented side locking bar technology offers improved security by protecting against lock bumping, an attack technique used to defeat conventional pin and tumbler locks

• Instruction/Installation Manual https://assets.unilogcorp.com/187/ITEM/DOC/Kwikset_101894207_Instruction_Installation_Manual.pdf
• Specification Sheet https://assets.unilogcorp.com/187/ITEM/DOC/Kwikset_100000644_Specification_Sheet.pdf