Abus EaZy KF carrying bracket for ABUS locks 47, 51, 54, 61 and 64.
Purchase as is if your ABUS lock came with an EaZy KF bracket and you only need an extra for another bike.
If your lock did not come with the EaZy KF bracket then you need a shackle clamp for your lock. This clamp mounts on the U-bar of your lock and fit's into the EaZy KF bracket.
EaZy KF mounts on "round" frame tubes from 28mm (1.10") to 36mm (1.42")