The OX Locker™ is built to last. From its extra thick differential cover to its unique 4 pin design, you can see and feel the quality. The new OX Locker works with a simple push/pull of the activator switch. It takes no electricity, no air, and no hassles! The best part is that it locks and unlocks for your driving needs. Unlock for highway driving and tight turns off road. Lock for tough terrain and rockcrawling.