The popular folding lock design offers great protection against attacks against the locking mechanism itself – thanks to high-quality locking cylinders. The hardened links of the folding lock also successfully resist metal saws and bolt cutters. They're more flexible, often somewhat lighter than U-locks and can be folded like a folding ruler. Folded compactly, they fit, rattle-free, into the bike-mounted case that's usually supplied with them. If you choose a quality brand like Abus or Trelock, you can expect flexible and secure theft protection for the city. When securing your bike, also lock it to a solid, anchored object to prevent the bike from simply being carried away.