ABUS frame lock chain Adaptor Chain 6KS: For double security. The ABUS frame locks serve as a reliable immobiliser. However, if you also want to chain your bike to a fixed object, you are well equipped thanks to the connecting chain, Chain 6KS. The chain can be connected with matching ABUS frame locks. To do this, the lock of the chain must be inserted into the matching lock housing on the frame lock. But, which frame locks are compatible with the chain? The following ABUS locks can be upgraded with the Chain 6KS frame lock chain: Pro Tectic 4960, 5750L, Pro Shield 5850, 5650, Pro Shield Plus 5950. The insertion chain does not require an additional key. The key of the spoke lock opens and locks both components. Frame lock chain made of hardened steel; Additional security for bicycles with frame lock; Compatible with many ABUS locks; Plastic coating to protect against paint damage and scratches.