About this 3D model

This spring needs to be installed in two directions, forwards and backwards. This will center the movement trajectory and allow it to be used as a slingshot, without worrying about damage. The rounded head acts as a limiter. Installing two springs in the same direction: 1, Turn the spring counterclockwise for one full rotation. Use a small stick to hold it in place and have a friend remove the stick, this will earn you their friendship. 2, Turn the spring clockwise all the way. You will hear a pleasant sound. Thank you for your support!