The highest level of security. With the GRANIT CityChain XPlus 1060 chain lock, you get security at the highest level. You can't secure your high-quality bike any better. Seven test seals from different countries speak for themselves: The GRANIT CityChain XPlus lock from ABUS is among the safest bicycle locks on the international market. The lock is certified with a security level of 15 – the highest level of the ABUS security system. Both the chain and the housing, as well as the load-bearing parts of the locking mechanism, are made from specially hardened steel, making theft significantly more difficult.