The Zeta Body Microneedle Body Roller is a tool for home use with 1200 high quality titanium needles (1.5mm), which stimulates the production of natural collagen and helps reduce sagging skin, stretch marks, cellulite and scars. How it works: Derma rolling is a simple and minimally invasive procedure that you can easily apply yourself at home. It creates controlled minor injuries to the skin, which your skin will then heal by producing collagen. Derma rolling allows the serums and creams you use to take full advantage of their properties as it increases the absorption of nutrients by 200%. * It has 1200 titanium pins 1.50mm (The strength and durability of titanium allows many months of use) * Includes a case for safe storage * Includes detailed user manual * Sterile for your own safety