The fixed foot cup base is forged and pressed by 45 # forged steel, which has strong bearing capacity and impact resistance. The screw and the hexagonal adjusting head are processed and formed in one body, with higher reliability and stability, and can adapt to uneven floor and foot cup surface plating with nickel, and the bottom is provided with black ultra-thin shock absorbing pad, which has good corrosion resistance and certain shock absorbing and skid preventing performance.