ABUS 4960 Frame Lock 6KS100 Loop Chain Extension: 100CM
The CHAIN Frame Lock Chain from ABUS 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 adapter chain can be inserted into all ABUS frame locks whose product names contain a combination of four numbers.