Features: Super Anti-Theft with Alarm:Small size and loud volume.Dual reinforced high security disc style cylinder,fits smaller vent holes. Strong and Durable: With waterproof function,keep working in rainy days and no rusty.Rugged disc locks are hardened to resist cutting, sawing and chisel attacks, high security anti-drill lock core. Anti-Theft with 110dB Alarm: 110db alarm will automatically activate upon sensing any vibration or shock and is loud enough to discourage a would-be thief. Wide Range of Applications:Motorcycle disc lock suits for Most Motorcycles,Scooters, Cruiser,Chopper, Sport Bike, Racing Bike. Services: If you have other questions,please connect us in time, we will give you satisfactory reply.