Over 1.5 billion tonnes of steel are produced annually around the world. It is, without a doubt, one of the most important materials in our modern industrial civilization. That goes double for bicycle security. When it comes to keeping your ride exactly where you left it, solid steel can't be beat. The Abus Ultimate offers real peace of mind, with its quality construction and double-pin locking mechanism, you can confidently go about your day without needing to constantly watch your bike over your shoulder.