Description Product Overview The Alarm-D is a high security D-lock with integral alarm.The Alarm-D boasts a 16mm shackle and comes with a high tech pick-resistant locking system.The Alarm-D has a key replacement service. When you buy your Alarm-D, simply note down the number which comes attached to the keys on a metal tag. 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. Loud 120dB alarm siren16mm ⌀ shackle3 x high security keysLong-life Lithium CR2 battery Product Specification Oxford Alarm-D 200mm x 196mmW x 16mm – 120db D-Lock In the box Lock3 Keys