Jigsaw Massager

Step 2 Make the pounder foot

This contraption is the part that hits you in the shoulder so wonderfully. There are any number of ways you could do this but here's what I did.

Take the key and see how close it is to fitting into the chuck of the jigsaw. It'll be a lot thicker than a blade so most likely you'll need to grind it down. Note that the pictures show two different keys as I made two of these. Note also that aluminum keys are not as strong as brass keys, and if someone tries to massage their lower back while sitting in a chair and leaning back on the jigsaw at an angle, the key may break off.

Once the key fits in the chuck, attach the chair leg tip to it (you may need to grind down some of the key head too). I filled the tip with some Bondo to support it, give it more heft, and attach it to the key. Mix a small amount (a tablespoon or so if plenty) according to Package Directions and squish it into the chair leg tip. Push the key head into the tip, you probably have to squeeze the tip to make it wide enough. Let the bondo cure, which will take between 5 and 15 minutes depending on the mix proportions.