Kwikset 660 Deadbolt Lock, Satin Nickel Round Exterior Keyed Front Entry Door, Single Cylinder Dead Bolt, with Microban Protection

The largest-selling deadbolt in America, the 600 series provide tough, effective protection at an affordable price. This single cylinder deadbolt is operated by a key on the outside, or a thumb turn on the inside. Secure your front door with Kwikset keyed entry door locks, security sets and deadbolts. Recommended for exterior-facing doors or securing interior rooms with a key for maximum privacy. Choose from a variety of stylish finishes to match your home décor. Kwikset is the #1 selling U.S. lock brand*, protecting families with trusted security since 1946. Kwikset offers smart, simple, stylish and secure door hardware for every home or business need — from mechanical locks with patented SmartKey Security to innovative and flexible smart home technology. *YipitData Unit Share Report, 2026.

• KEYED DEADBOLT: Use on doors requiring a high level of security, turn piece interior locking, exterior locking using a key. Recommended for exterior-facing doors
• SMARTKEY SECURITY: Kwikset’s SmartKey Security technology protects against advanced break-in techniques and allows you to re-key your lock yourself in seconds
• EASY INSTALL: Do it yourself, installs in minutes with just a screwdriver, all the hardware you need is included for a hassle-free installation, detailed directions provided
• FITS STANDARD DOORS: Fits standard size doors 1-3/8" to 1-3/4" thick, latch backset adjusts to either 2-3/8" or 2-3/4" with just a twist during installation
• ADJUSTABLE LATCH: With just a twist during installation, the latch backset can be adjusted to either 2-3/8" or 2-3/4" in order to fit all standard door preparations
• TRADITIONAL DESIGN: Available in a classic, traditional door hardware style with simple, unique details to match your home décor
• CERTIFIED TRUSTED QUALITY: Security, Durability and Finish are Grade 3 BHMA certified, designed for reliable protection, providing peace of mind at home
• WARRANTY PROTECTION: Our products are backed by a lifetime mechanical and finish warranty with great customer service, see Kwikset warranty for more details