MTM Snap
More info on the MTM Snap can be found at http://mtm.cba.mit.edu/machines/mtm_snap-lock/. There you will find the ShopBot files for both 12mm and 1/2" HDPE, as well as the sample snap mechanism dxf file.
File:/home/ata0921/Downloads/5935444583 a2f01081e3 b.jpg
More info coming soon!