There are cards without commissions abroad, but these are not usually the ones given by traditional banks such as ING, Banco Santander or BBVA, with commissions of between 3 and 5% plus other costs for paying in another currency or withdrawing money of ATMs.
Credit and debit cards typically look the same on the surface. Both have 16 digits, an expiration date, magnetic stripes, electronic chips and security codes.
The use of credit cards are very popular in the United States. However, many people lose sight that it is money borrowed with interest rates that they have to pay.