I have "freed" with the chiselling out of this sentence in the last 3 weeks of a kitchen tile, propped slots in the wall and drilled holes in stones and concrete. There has been nothing broken and all still work perfectly satisfactory. The set is well worth the money in any case. The inside of the suitcase I had indeed first fix with ordinary adhesive tape, but now all the parts are well accommodated.
Of course, a drill for 25 euro Price per unit might be sharper, but for my hobby purposes, the set is just the thing.
