Like having a guard dog (perhaps, a pit bull?) watching over your two wheels! The OnGuard 8003 Pitbull Std U-Lock is a very sturdy lock, providing ultimate security for your bike and rating of 80 out of 100. The 14 mm shackle is made out of ultra hardened steel and the cross bar locks to it on 4 sides. The squared U-shaped shackle measures 4.53″ x 9.06″ and that wider shape makes it a bit easier to lock your bike to poles and stationary objects. Five laser cut keys (1 micro-light and 4 extra grip keys) and a mounting bracket are included. They also offer an anti-theft protection program ($1 for 1 year, $10 for 2 years, or $15 for 3 years) that provides coverage for up to $2251 for bikes and $751 for power sport vehicles (e.g., motorcycles, scooters, watercraft, personal watercraft, snowmobiles, and ATVs). Protect your bike with the OnGuard Pitbull Std U-Lock, and stay tuned for another super lock from the folks at OnGuard!