The Oxford Boss 16 (formerly known as Big Boss 16 and Boss 46) is a super strong disc lock with a 16mm shackle.
The Boss 16 has been independently tested and approved by Sold Secure Powered Cycle (Motorcycle) Gold standard, Classe SRA, SBSC Intygad Produkt, FG and ART 4*.
This lock has a key replacement service. When you buy your lock, simply note down the number which comes either attached to the keys on a metal tag or is laser marked on each key.
 
FEATURES
• Replacement key service is available
• Includes 3 keys
• Can also be used as a general purpose lock
• Hardened steel 16⌀ shackle
• High security, independently approved disc lock
• Unique double locking mechanism is twice as secure
• Attack tested: freeze, bolt cropper, saw, sledge hammer, drill resistant
• Anti-jack design
• Compatible with a chain (chain not included)