If you're looking to make your own hot wheels axle, there are a few things you'll need to do. First, you'll need to find a piece of metal rod that's about 3/8 of an inch in diameter. You can find this at most hardware stores. Once you have your rod, you'll need to cut it to the desired length. A hot wheels axle is typically about 2-3 inches long.
Next, you'll need to file down the ends of the rod so that they're nice and smooth. Once that's done, it's time to start bending the rod into shape. A hot wheels axle is typically curved, so you'll need to use a hammer to gently bend the rod into the desired shape.
Once you have the basic shape of the axle, you'll need to drill two holes into it. These holes will be used to attach the wheels to the axle. Once the holes are drilled, you can start attaching the wheels. You'll need to use two small screws to attach each wheel to the axle.
And that's it! Once the wheels are attached, your hot wheels axle is ready to go.