Facial Massage Tools includes gua sha stones in materials such as rose quartz and stainless steel, plus electric facial massage rollers.How to use gua sha: apply a face oil or serum first, hold the tool flat against the skin and glide gently outward and upward. Clean the tool with mild soap and water after each use. Electric devices: read the safety information on the product page before use; people who are pregnant or have implanted medical devices should check with a healthcare professional first.