Feature1
  This product has a hook for fixing the body while fixing the lower part of it, so problems caused by the body twisted or swollen after fixing were solved. 

Feature2
  In case of existing products, pipes and adjusting rings were swollen together while fixing PVC pipes and cracks were formed in connecting parts, causing unstable construction due to shaking. 

As adjusting rings of this product are fixed to the upper plate and designed to adjust just PVC pipes upward and downward, no cracks are formed in connecting parts after fixing and there is no shaking, facilitating strong and precise construction.