Not that I've ever hemmed jeans or anything, but I am prepared if I need to! I added the Jean-a-ma-jig & Demin set to my Nancy's Notions order (Recycling Jeans Notions Value Set). It came with the Dritz tool that helps prevent skipped stitches and broken needles when you are sewing over bulky areas of fabric, some denim, topstitching, and metallic needles in various sizes, and a surgical seam ripper. I also got some topstitching gold thread for that authentic jean look.
The Jean-a-ma-jig is like a little step-ladder for your presser foot. When you come to the thick seam when hemming jeans, you keep the needle down, raise the presser foot, and slide the tool from the back under the foot. Then you slowly stich across the seam and off; move the tool to the front and continue sewing until you are on the jean-a-ma-jig and clear of the seam bulk.
The Jean-a-ma-jig can be used with any sewing machine and it works on any thick fabric like jeans, jackets, towels and QUILTS! It will be good to have in my sewing kit (it might be handy for piecing thick patchwork seams) and who knows, maybe I will hem some jeans one day! You can get Six Tips for Working with Recycled Demin and read all about the set at Nancy's Notions HERE and watch the video to see how the Jean-a-ma-jig works (skip ahead to 3:22 if you just want to see it in action).