Only LifeLong Locks offer a "Locked into Quality Lifetime Replacement Guarantee." So if any part of your lock fails to perform (as long as it is not due to neglect or misuse), you can just send it back with your proof of purchase and we'll send you a new lock free of charge. Guaranteed. LifeLong Locks are rust proof, weather proof and theft proof, giving you a lifetime of protection no other lock can provide.