For maximum-security, secure your bike with the Blackburn 10"Bicycle U-lock featuring a patented Anti-Theft shackle made from a hardened steel, crossbar with protective housing, and a key hole dust cover for lock mechanism protection against the elements. Blackburn's patented oval shaped Anti-Theft shackle prevents pivoting if one side of the shackle is cut. This hardened steel, patented shackle design doubles the amount of time and effort needed for thieves to successfully cut and steal your bike. Includes one standard key and one lighted key which locking and unlocking at night a breeze. For every key lock, Blackburn® offers a free standard key replacement program. Blackburn has all locks rated by a 3rd party testing facility for trusted, unbiased, and qualified security ratings. An independent lab has rated the security of this lock a maximum score of 5 on a 5-point scale. At a level 5 maximum security rating, the Blackburn® 10" Bicycle U-lock comes with a $1000 anti-theft offer. To redeem both offers, register online directly after your purchase.