Dremel the inventor of the ez speed clic quick change system for rotary tool accessories now offers an extended line of ez speed clic metal cutting accessories the starter set sc406 includes the unique ez speed clic mandrel and two fiberglass reinforced metal cutting wheels the sc456 sc456b and sc409 are replacement metal cutting wheels whereby the sc409 wheels have a thickness of just 075 mm packaging contents the starter set 406 includes the ez speed clic mandrel and two metal cuttings wheels