NWOT: Keys Soulcare Obsidian stone face roller. DERMATOLOGIST-DEVELOPED, CLEAN SKINCARE TOOLS: A stimulating, handcrafted obsidian stone face roller that helps promote tranquility for revitalized-looking skin Stimulates the senses Helps revitalize the appearance of the skin’s tone, texture, and suppleness Energizes as it soothes the skin with a cooling touch