The microneedling derma roller made with short, blunt 0.25mm needles, which does not penetrate living layers of skin, you can use it safety at home. The derma roller is easy to use, it is perfect for men and women. Package Included: Black 0.25 mm derma roller x1. How to use: 1. Rinse the roller head with water before use. 2. Wash face. 3. Roll on face 2 to 4 times in different direction (horizontally, vertically, diagonally). 4. Clean and store the product.