Due to popular demand we have added these 'magical crimpers' to our tool range. These 'magical crimpers' crimp 2mm x 2mm Sterling silver crimp tubes, they squash the crimp in such a way that the crimp appears to look more like a bead, eliminating sharp edges. The green magical crimpers are designed for use with .014''-.015'' flexible wire. The purple magical crimpers are designed for use with .019'' flexible wire. There are diagrams on the back of packaging showing how to use the crimpers. They are definitely a tool for the perfectionists out there.