ABUS Steel-O-Flex Tresorflex 6615C: Instead of searching for a key, all you have to do with the Steel-O-Flex™ Tresorflex 6615C is choose your desired combination, adjust the number roller and know that your bike is safe. The clever cable lock is full of ABUS quality: The 15 mm thick steel sleeves surrounding the steel cable make it extra difficult for thieves. Moreover, the mechanism of the Steel-O-Flex™ Tresorflex 6615C is effectively protected against tampering thanks to special sensor protection. Comfort comes first: The digits on the number wheels are so well embossed that you can set the right combination to unlock the door even at night just by touching it.