Cobra SideWinder have extreme picking resistance, limited key blank access and over 250 million key code combinations available. Each Cobra SideWinder lock has 10+ combination locking plates each containing multiple anti picking grooves. The locking plates align with a sidebar to keep the inner cylinder engaged with the shell in the locked position. SideWinder locks have a Symmetrical key that will work in either direction, making this a very user-friendly lock. HIGH SECURITY PUCK LOCK: Cobra SideWinder have extreme picking resistance, limited key blank access and over 250 million key code combinations available. Each Cobra SideWinder lock has 10+ combination locking plates each containing multiple anti picking grooves. The locking plates align with a sidebar to keep the inner cylinder engaged with the shell in the locked position. SideWinder locks have a Symmetrical key that will work in either direction, making this a very user-friendly lock.