It mentions "disabling chip and pin", meaning it will convert the sentinel character on the magnetic stripe which tells the terminal that it is a chip card. By disabling the sentinel character and using this on a chip enabled terminal, the financial institute (BASE24) SHOULD decline the transaction because the Track 2 data will be incorrect.

Edit: I meant on an EMV compliant terminal.

Edit: Also, that is considered fraud and your best not testing it, unless you like the prison environment.