The master lock quantum 1800 x 12mm combi phosphorescent lock uses a glow in the dark combination lock system to ensure that you will never struggle again trying to lock or unlock your bike in the dark the cable itself on the master lock quantum is made from braided steel and with the four digit combination lock which is easily re settable you can be sure that your bike is being held securely at all times equipped with a vinyl cover the master lock quantum 1800 x 12mm combi ph