The compact Urban Security lock is 14mm thick, made from non-rust steel and can be fitted wherever the is an appropriate cutout in the disc. Discreet protection against theft of your scooter or motorcycle. When attempting to break the brake disc lock a flashing light and loud alarm of 120dB is activated. The alarm function can be disabled and the lock used as a simple drive-away lock for the brake disc. Equipped with a CR2 lithium battery. Replacement alarm modules are available separately.