For my time and money the EZ lock system is a marketing gimmick when the steel universal chuck ??? at 10 dollars ??? will outlast and is far more versatile than the EZ Lock line.So all you Dremel/Rotary tool users should weigh your options before thinking EZ lock represents a real savings: it costs more to operate, doesn???t last as long as even Dremel branded options, and the less than a minute y