As Bell’s highest security rated cable lock . the Key Cable Lock with Light Up Key offers an easy and convenient solution to secure your bike with longer length and a flexible design. The 6ft-x-12mm Heavy Duty braided steel cable provides significantly higher cut strength. An included dust cover protects the key chamber from the elements for a longer lasting locking mechanism. Includes one standard and one lighted key . which makes locking or unlocking bikes at night a breeze. Bell also offers free standard key replacement for all key locks. Follow the directions on the package to register your key as soon as you receive your lock and we will send a replacement if your key is ever lost. An independent lab has rated the security of this lock a 3 on a 5-point scale.