DescriptionAdopting advancced copper core, this motorbike lock is hard to open without key. Made of iron material, high hardness and durable for use. Built-in siren, when misoperating, the siren will sound sharply. Mini size but heavy weight, suirable for bicycles, motorcycle, scooter, and electric vehicle with brake disc.Feature- Color: Black. - Material:Copper + Iron. - Size: About 12.3 x 9.2 x 2 cm. - Made of advanced tamper-resistant lock core to be scarcely opened by other keys. - Microprocessor controlled and movement sensors trigger a siren. - Used on the front brake lever will keep the bike from being pushed off the centre or side stand. - Used on the rear brake lever will hold the back tyre from allowing for the loosening or re-torquing of the clutch nut when doing belt, clutch and variator maintenance. - Used for locking the bicycles, motorcycle, scooter, and electric vehicle with brake disc to prevent thefts, letting you not worry about the safety of your bicycle. - Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!