the castle to protect my e-bike from being stolen, the length is sufficient for connection to a Pflahl or Radbügel. The castle is difficult and "compact"; you need a lot of strength to turn the lock to it "roll" for the transportation as shown on the product photo together. Unusually - to close the key must be in the lock, so you can not lock the transport in the open state with no key in the lock. The locking mechanism makes a better impression than the one we know from 20-30Euro locks. Hope this makes it also much safer! I prefer 1 Star or because my castle is something too heavy to move. But still I would hesitate to recommend it, because it makes a very good impression.