The Abus ACH 6KS Adapter Chain makes it particularly easy to make your bicycle twice as secure: simply place the chain around a fixed object, pull the end with the lock through the ring on the chain and attach it to the lock housing. You will not need another key, nor will you need to lock the shackle separately. The Abus ACH 6KS Adapter Chain is suitable for use with Abus frame locks 4960, 5850, 5650 and 5950.Abus ACH 6KS Adapter Chain Features6 and 8 mm thick, square chain made of hardened steelSeparate locking of the shackle is not necessaryOpens up a lot of opportunities for locking the bicycle on to a fixed objectSuitable for use with frame locks 4960, 5850, 5650 and 5950 More info