If you're looking to improve your home’s security with a project you can do yourself, the Kwikset 660 Single Cylinder Deadbolt (model 660-15-SMT-RFAL-RCS) is a solid, user-friendly option. Designed with both durability and convenience in mind, this deadbolt features SmartKey Security™, a re-keying system that allows you to reprogram the lock yourself in minutes—perfect if you've just moved in or lost a key. This is a single cylinder deadbolt, which means it locks with a key from the outside and a thumb turn on the inside—ideal for entry doors where safety and simplicity matter. It comes in a sleek satin nickel finish that blends well with most home styles, whether traditional or modern. The adjustable latch and round corner strike make installation easier for first-timers. It fits most standard doors, and the instructions walk you through the process step by step. All you need is a screwdriver—no need to hire a locksmith or use special tools. The round faceplate provides a clean, classic look and a smooth fit. And because it's from Kwikset, you can trust that it’s built to last and engineered to resist tampering and forced entry. Whether you're replacing old hardware or installing a new lock on a front or back door, the Kwikset 660 is a great pick for any DIYer. It's a simple way to boost home security with confidence—and without the stress.