This is the Giant SureLock Tough 1 Cable Lock.Bike locks provide a deterrent to bike theft, however, no lock is theft proof. Please research both your area you plan to lock the bike, amount of time and time of day, and then which lock best suits your specific needs. Remember that locks may seem expensive, but a new bike is always more.

Features:

X2P double bolt locking mechanism for added security
Double-locking hardened steel 11mm (0.43") shackle provides maximum security
8mm (0.32") titanium enforced hardened square steel chain links for high cut-resistance
Z-cylinder is more reliable and user-friendly than ever before, prevents key from turning before being fully inserted into the cylinder
Nylon chain cover prevents scratching and allows for compact storage: throw it over your shoulder
High security, pick and drill resistant lock cylinder
Includes 3 standard keys with over 30,000 key variations