The adapters are better than me. The sculpture seems stable. The recesses are a perfect fit. The nano to be used or Microsim is retained by a side-mounted adhesive foil - but not very strong. The adapter will work best if you want to use them for the following Simcard slot types: 1) Simcard slot for pushing straight 2) Simcard slot to take out and inserting 3) Simcard slot with pop / lever mechanism (you know what I meien?)
Slightly frustrating is all run with Simcard slots, for which one must be pure friemeln the SIM card at an angle. The nano- or Microsim employed will fall out probably during threading or Raus fiddling. With a little skill but is also the success.
For the low price's from me a clear recommendation.