The European Central Bank, after cutting its key interest rates on Thursday, still has other weapons up its sleeve to boost recovery in the eurozone, its president Mario Draghi said. "We have a whole range of instruments we can mobilise if necessary," Draghi said after the ECB took financial markets by surprise and cut its key interest rate by a quarter of a percentage point to a new all-time low of 0.25 percent in the face of deflationary fears.