The innovative IvyTex cover is dirt and moisture repellent. Additionally, it increases protection as the synthetic material makes it harder for cutting tools to penetrate. Beneath the cover is a chain with a square profile made of hardened steel alloy. The chain can be connected to several ABUS frame locks as well as to the Alarmbox 2.0. It serves as extra security, for example, to lock the bike with a pre-mounted frame lock to a fixed object. No additional key is needed for the insertion chain. The key to the shackle lock opens and locks both components. The IvyTex chain is available in various lengths, link thicknesses, and even colors. We have the right adapter chain for all city bikes.