The Bordon Big Plus 6000 provides the security of a U-Lock with the flexibility of a chain - supersized to meet your over-sized locking needs. Perfect for fat bikes, cargo and bikes, The Bordon Big Plus 6000 is made of temper hardened steel bars encased in an extra soft coating to protect your bike's paint job. The lock body, links and supporting elements of the locking system use the same high quality steel you'll find in the bars. The Bordon Big Plus 6000 features a Premium Cylinder that can be keyed alike with other Bordos using the same cylinder - perfect for households with multiple bikes and locks. The Premium Cylinder offers a high degree of protection from picking. Two keys are supplied with this lock.