starburst r set layering steel thin die for hand roller mill die cut roller mills or electric roller mills (such as the Sizzix Big Shot Switch ) Spellbinders and Sizzix etc.
size ranges from 2 1/4 " - 1/2", and these will shrink to half their size.
Here is a link to successfully using the die cuts in a Sizzix machine.
https://vimeo.com/737292992
starburst thin metal die cut
$6.00Price