The Unkrautstecher indeed makes a high impression, in practice it is not usable. After 2 minutes, the handle has solved. The problem here is that can be metal and wood combine permanently poorly. With the three indentations in the metal, the evil is inevitable ...
I am now trying to connect the two parts with assembly adhesives - a return is not available in relation to the value of goods too expensive.
Conclusion: Better buy such products in stores and test. Too bad, but their design is insufficient.