25mm steel sleeves are normally reserved for cable locks to secure scooters and light motorbikes. With the Steel-O-FlexTM 950, you are now playing in the same league when it comes to securing your bicycle. Specially hardened steel of that thickness is always a difficult target for thieves.
The built-in ABUS Plus cylinder is also protected against tampering such as picking. And to make sure you can get the most out of your Steel-O-FlexTM 950, the keyhole is concealed by a manual cover to protect it against dirt and corrosion.