I had a really crappy jig saw, a "Consumer" grade Ryobi. The blade was held in place by a grub screw, and you needed an allen wrench to change it. The whole thing was so mickey mouse if you cut anything thicker than about 1/4", the whole plastic case, or body of the machine would flex.
Cost me about $50, I had turfed it, and bought the Bosch that I have now, but a buddy came by and saw it in the circular file, and wanted it, I warned him, but he was happy with it..
Total piece of junk, but that was the last cheap poor quality tool I think I've ever bought, I think I might had actually learned that lesson......well maybe
The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
William Arthur Ward