Serious about bike security? This ABUS Adaptor Chain takes your protection to the next level! Designed to work with ABUS frame locks that have additional lock bodies (like Pro Tectic 4960, Pro Shield 5850/5950) and the Alarmbox 2.0, this 6mm thick chain gives you double security. The 85cm length is perfect for locking your bike to poles, racks, or other fixed objects. Made from hardened steel with plastic coating to protect your bike's paint from scratches. The coolest part? You don't need an extra key - just insert the chain into your frame lock's housing and use your existing key. The 2.0 version has an upgraded coated loop ring for even better scratch protection. This is such a smart way to immobilize your bike with the frame lock while also securing it to something solid. Much more convenient than carrying multiple locks, and way more effective against thieves. ABUS is known for quality security products, and this insert chain lives up to that reputation. Sleep better knowing your bike has serious protection!