One embodiment of a locking device of the type for motorcycle helmets having a cable (50) which is fastened at one end to the device, and which passes though the face of the helmet and is detachably secured in the locking device to releasably secure the helmet. The active locking element of the lock (44), when in locked position, secures the cable (50) and acts to deny access to the fastener (36) securing the device to the motorcycle handlebars, so as to resist removal of the device from the handlebars. The cable (50) is flexible, has permanently formed spiral convolutions and is partially held in place by the concave shape of the device. The device can be used to secure helmets, jackets or other items, and, in various embodiments, it can be used to lock a vehicle or item to a fixed object to deter theft of the vehicle or item. Other embodiments are described and shown.