Disc Lock (Universal) A universal disc lock is a compact, portable security device designed to immobilize motorcycles and scooters by locking onto the brake disc, preventing wheel rotation and deterring theft. Key Features to Consider: Locking Pin Size: Ensure the pin fits through your motorcycle's brake disc holes. Common sizes include 5mm and 10mm. Alarm System: Some disc locks come with built-in alarms that emit a loud sound when tampered with, providing an additional layer of security. Build Quality: Opt for locks made from hardened steel or other durable materials to resist cutting or drilling attempts. Portability: Choose a compact and lightweight design for easy storage and transport.