Oxford Boss Motorcycle Alarm Chain & Lock The Oxford Boss motorcycle alarm chain & lock features Oxford's strongest ever lock with an integral alarm. The motorbike padlock has a 16 mm shackle and an almost deafeningly loud 100 db alarm which is triggered by movement sensors (the padlock can also be engaged without setting the alarm). Combined with a 12 mm hardened steel security chain, the Boss alarm chain & lock will put off any would-be bike thief and put your mind at ease. The Oxford Boss Alarm Chain Lock has been independently tested and approved by Sold Secure and has been awarded Motorcycle GOLD standard, SBSC and ART 4*. Insurance discounts are available in the UK when you use this lock. A key replacement service is also available. https://www.youtube.com/watch?v=GPLuBa5d21w&feature=emb_logo&ab_channel=OxfordProducts Motorcycle Alarm Chain & Lock Features: PADLOCK Super strong 16 mm shackle. Very loud 100 db alarm. Attack tested and resistant to sledgehammer, saw, bolt cropper and drill attack. Anti-jack shackle design withstands 4.5 tonnes of tensile load. The removable sealed unit alarm module is vibration-resistant and weather-proof against water, frost and heat. Can be used as a disc lock or a padlock. Three keys and replacement key service provided. Batteries included (6 x LR44). Combine with 12 mm hardened steel chain to give additional security. Sold Secure Gold. Secure by Design*. CHAIN 12 mm square link chain made from Ni-Cro-Mo alloy steel. Case hardened chain to resist bolt cutters. Zinc coated to prevent corrosion. Protective cloth sleeve to help prevent damage and make it easier to handle. Long links reduce weight and increase portability. Fits all Oxford ground anchors. Can be easily stowed under the seat. Available in three lengths: 1.0, 1.5 & 2.0 metres. *This product (Oxford Boss Alarm Padlock) has met the high demands of the Police Preferred Specification and has been accredited Secured by Design. SBD is a police initiative which seeks to achieve sustainable reductions in property theft. By encouraging good design and practice, SBD aims to reduce the demand on police forces and help us all live in a safer society. Oxford Products Ltd hold the Secured by Design License for: Oxford Boss Alarm Lock & 12mm Chain.