The Swappable Heads Roller roller with interchangeable heads: obsidian roller, white quartz gua sha, stainless steel and zinc double massage ball.With its three interchangeable heads, this versatile massager is an ideal tool for relaxing muscles all over your face and promoting the absorption of active ingredients from the beauty products you use every day.- Roller made of obsidian: The roller helps to stimulate blood circulation. - White quartz gua sha: The gua sha massage stone helps to revitalise the face and smooth wrinkles and fine lines.The white quartz has a calming and at the same time dynamizing effect. - The massage double ball made of stainless steel and zinc: Thanks to its kneading and draining movement, the massage double ball is ideal for the oval of the face, the arch of the eyebrows and the cheekbones.