colorful with obstacles

I ordered this set, as I deal with colorful fabrics, where normal pushbuttons would simply be inappropriate.
All in all, this set is useful - the selection of colors is decent and the boxes are quite convenient.

However, the pliers is shaky and has to be adjusted with your fingers, otherwise the plastic parts are broken and not riveted together.
Unfortunately, there is also a manual, so I can not know if I'm doing this at all really - and if I vllt. have to do something different, so the tongs works better.