Torque wrench – is it good?

N’Evening on all sides! Since I can do some work on my moped in the near future, I need the right tool. I bought the following torque wrench from Louis today: http://www.louis.de/_20b527c118c7906…nr_gr=10003929 There was also one to choose which was about twice as expensive, but in the description there was nothing to see why (material, setting range,…) To make it short: does the key do something or do I bring it back better again ck? In general, I’m always close to the cash register as a student, but if I break more with the tool than it does nothing. So if you can say something about it, that would be great! FRY