Cutting causes burrs

With many SIM cards for different countries, I wanted to cut myself.
The precision of the cut is not exceptional. In addition there is the cutting nano format. Once cut, it must be put in a micro sim sim adapter (supplied) to use it in a samsung galaxy note 2 for example.

The worst is that I have the sim cards of several generations, and some chip is larger than on the news. So cutting is done in copper edges of the chip. It is especially then that the chopper problem. Indeed cutting on copper causes burrs ... and the burrs cling when inserting them in the phone. These blunders have deteriorated even a mobile.

Note that many specialty shops offer free cutting.

So this chopper was returned and refunded without problem.
The return costs are borne by Amazon.com, which is a great service compared to most competitors who pay the return costs.