The Magnum is an ultra-strong U-lock. It boasts high security independently approved 16mm shackle lock with hardened steel construction and has undergone rigorous testing achieving Sold Secure GOLD ART 4* SBSC and FG certification.The Magnum has a key replacement service. Keep this in a safe place then in the event that you are unfortunate enough to lose all your keys it will be possible to get a new key made up for you.Key Features Sold Secure Motorcycle GOLD 16mm shackle Ultra-strong double locking mechanism High-tech pick-resistant locking system Saw bolt cropper and drill resistant 2 x keys Lock head dust cover Dual use product Comes with carrying bracket for cycle use 5-minute attack tested 1.2m cable included (Duo model only)