This is it. The big boy of locks. Use Giant's SureLock Force 1 Chain Lock in the sketchiest areas to secure your prized possession. This beefy lock uses 10mm-thick titanium-enforced steel links with a hardened-steel double-locking shackle that provides maximum security. The high security, pick and drill-resistant lock cylinder uses a laser-cut key for the ultimate in protection. Encasing the chain is a water and heat-resistant cover that won't scratch your bike's finish.