I stronger recommend this motorcycle or scooter lock. The world's best disc-lock design... Stainless-steel mono-block construction, technically advanced double-locking system and high-security key ...With an alarm built in.This lock is very easy to use, only need the key to open the lock and turn the alarm off. To lock it you just push it closed. It is a very small lock that is not over wieght. fits easily under a bike seat of nearly all motorcycles. You can even change the level of sensitivity.