This product is used for crushing and processing precious metals and semiprecious stones. It is used for processing precious and semiprecious stones and crushing metals in the chemical industry. Here is our telegram link: https://t.me/Caluanie_Muelear_Oxidize_C you can join to see more of our work for more information Facebook: https://www.facebook.com/profile.php?id=100093152448055 Youtube: https://www.youtube.com/channel/UCATfMl7jXY460yIUT9bBcOA How it works: This product facilitates breaking nails with bare hands after a 10-20 seconds dive. Heavy water changes the properties of the metal, making it brittle. But at the moment of evaporation of heavy water, the rock returns to its previous state.