I bought the lock for securing luggage or motorcycle clothing on the motorcycle. It is intended to prevent casual thieves. The manual is useful and easy to understand. To set the code, you need a small screwdriver or similar .. The code can be adjusted well without special skill. The wheels can be adjusted individually well and make me a solid impression. Again, no special skill is needed. The operation of the lock is well explained in the manual. Since it only has two buttons, but it is largely self-explanatory. Overall, I am very satisfied and find the lock very practical for many applications.