butterfly 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 1/2 " x 1 3/4 " and 1 3/4" x 1 1/8 " 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
butterfly thin metal die cuts for shrinkets shrink plastic
$10.00Price