More durable. Compared with natural stone gua shastones, stainless steel gua sha tools are more durable. Because the natural stone guasha board is easy to break due to its material. It will break even if dropped from shoulder height. But stainless steel gua sha scraper does not have this problem.
A more uniform shape. This is due to the plasticity between materials. Natural stone, the texture and density of each piece are not the same, so it is difficult to achieve uniform quality and shape during processing. But the stainless steel hanging gua sha board solves this problem.
More stable supply. Natural stones are affected by the amount of mining, reserves and even policies, and the amount of rough stones that can be supplied in the market will fluctuate greatly. But stainless steel is relatively more stable.