The Boss is a super strong disc lock with a 12.7mm shackle. The Oxford Boss Disc Lock has undergone rigorous independent testing and has been awarded Sold Secure Motorcycle GOLD and is SBSC and FG certified. The lock 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. Key Features • Sold Secure Motorcycle GOLD. • Double locking shackle mechanism. • Anti-pick & anti-drill lock cylinder. • Hardened steel shackle prevents bolt cropping. • Can also be used in combination with 12mm square link chain to double security. • Dust cover to protect the lock barrel from dirt ingress. • Replacement key service available.