Blackburn Sing Sing U-Lock: Secure your bike with Blackburn's compact Sing-Sing U-Lock and it will be right where you left it. This maximum security lock has a 14mm thick steel shackle with an anti-scratch liner to protect your frame. A pick-resistant dual-bolt locking mechanism provides additional security. This easy-to-carry smaller-size lock includes three laser-cut keys, a mounting bracket, and has an anti-theft protection guarantee of $2,500.
