Graciela
Those tools are a scam!
A lot of people, including myself, have had their skin destroyed by these gadgets, I've been plagued by inflammation and other issues after I used them. Be warned and don't destroy your body. Fascia is a very important part of your body and once messed up with, you'll hardly ever recover. There's no scientific evidence or research behind them, just false publicity and greed to make money to sustain a certain lifestyle of the owner. NOTHING ELSE.




