Especially solid & secure locks for bicycles.
U-locks are classics when it comes to securing bikes and this for good reason. Solid materials and no moving parts outside the lock mechanism are an excellent starting point for the strongest resistance possible. Decades of experience with U-locks have made ABUS to experts in combining the most resistant materials with unique technology, and consequently one of the leading U-locks manufacturers. By the way: the police and insurance companies recommend the use of U-locks.