Abus Ivy 6KS/85 Adaptor Chain - 2.8/85cm 6mm Links Black. The innovative IvyTex cover is dirt and moisture repellent and even better: It helps to increase protection as the synthetic material slows down the use of cutting tools. Underneath is a square profile chain made of hardened steel alloy. The chain can be connected to a number of ABUS frame locks as well as to the Alarmbox 2.0.Plug-in chain for wheel locks provides additional security using only one key