No tools or assembly are needed - Your Pedlar® arrives ready to use, right from the box. If the tension knob happens to have come unscrewed during shipping, all you will need to do is screw it back in place with your hand - no tools required. When you want more or less resistance during use, the tension knob is designed to be easily turned by hand. If you need to adjust the length of the strap on the pedals, you can simply slide the opening in the strap over the restraining knob. Adjust the strap as needed, and push the strap back in place with your fingers.