OnGuard's PitBull Medium is a sturdy U-lock that defends your bicycle with 1/2-inch hardened steel and OnGuard's X4 quattro-bolt lock. And thanks to the included mounting bracket the PitBull will be along for every ride. This lock also comes with five keys, including OnGuard's Microlight key that has a built-in light.
Dimensions: 4.5 x 10 inches
OnGuard locks feature plastic, rubber or vinyl at all contact points to protect your bike's finish.
All OnGuard locks feature integrated covers for protection from moisture and dirt.