Oxford Motorcycle Alarm Chain10 The Oxford motorcycle alarm chain10 is a great choice for riders on the go who want to rest easy knowing their pride and joy is safe and secure. The Oxford security kit combines a 10 mm square link chain with a loud 90 dB alarm. This multi-purpose alarm chain lock will keep your bike and other valuable items secure from attack and the alarm will scare off any would-be thief. The Alarm Chain 10 has a key replacement service so that if you are unfortunate enough to lose all your keys a new one can be made up. Just remember to take note of your key number and keep this in a safe place. Motorcycle Alarm & Chain Features: 10 mm square link chain. Loud 90 dB alarm siren. Robust hardened steel construction. Protective chain cover. Batteries included (2 x CR2032 batteries). 3 keys included. Replacement key service. 2 year warranty. Available in 3 chain sizes: 1.2m, 1.5m and 2m.