The Oxford Nemesis Chain Lock is an ultra-strong and highly secure chain lock, independently approved for its strength, and can also be used as a disc lock. It features a 16mm hardened steel shackle that prevents bolt cropping, an anti-pick and anti-drill lock cylinder for enhanced security, and a shock-resistant rubber over-moulded lock body. The lock comes with 3 replaceable keys and a dust cover to protect the lock barrel from dirt ingress. It offers double security when secured onto a disc with the chain. The chain itself is a reassuringly huge 16mm hardened steel link chain, zinc coated to prevent corrosion. It has achieved Sold Secure Motorcycle GOLD rating, meaning it has undergone five-minute attack testing against drills, sledgehammers, bolt croppers, and saws.