The Abus Steel-O Chain 8900K offers versatile security for urban riders, delivering mid-level protection that can stand alone or complement heavier u-locks. Featuring 8mm square hardened steel links and a pinned fabric sleeve for frame protection, this chain is crafted from special temper-hardened steel for enhanced durability. It includes two keys, boasts anti-drill protection, and excels in resisting corrosion, making it a reliable choice for added bike security that's both user-friendly and portable.