​【Widely Application】 Brake disc lock fits for various vehicles with up to 6mm disc brakes: motorcycles, mopeds, yachts, scooters, bikes. 【Practical Lock】 This Motorcycle lock is made of aluminum alloy, high quality and durable. Waterproof, resistant to high temperatures, suitable for outdoor climatic conditions. 【Easy to Use】 Press the alarm lock button to start the locking operation, and 5 seconds later there will be a "beep" to indicate the alarm is activated correctly. Use the key to unlock the alarm. 【SOLID & WATERPROOF】High grade heavy duty alloy steel body and cutting edge technology smooth surface make the brake lock more durable.Waterproof rustproof and weather-resistant with forged stainless steel keeps it working in rainy days. 【Disc Alarm Lock】This alarm disc lock built-in shock sensors is capable of detecting vibrations and movements. The 110db alarm system scares off potential loss while at home or parking outside, handy for bikers when parking outdoors or at home.