automatic umbrella

You will need:・0.8mm drill・0.3mm thread・A spring with wire thickness of 0.65mm, outer diameter of 8mm, and length of 32mm. If the top and handle do not fit over the stem, grind down the stem as needed.Using craft string to connect the bones to the sliders is a bit tricky, but I'm sure you can do it. This is the model I introduced on my YouTube channel.