[safe and easy to use] our beard roller is very easy to use. The black silk of this beard roller is not a hair. After receiving the product, it must be disinfected and cleaned before use. [general specifications of the miniature needle] genuine leather roller this product adopts one of the most commonly used designs of the miniature needle, embroidered steel for medical purposes, suitable for skin care, and is not easy to break. [size] 135*29mm [Multi - Skincare] This micro - needle roller for men and women can be used with creams and also helps to improve the absorption of skin and beard growth products. [promotes beard growth] micro needles create thousands of microscopic channels for hair follicles, direct healthy, nutritious blood to the treatment area and activate the body's natural healing process to produce the collagen needed for beard growth. hair growth. [Frequency of use] micro needles do not need to be used daily, usually twice a week, once a week if the skin is a little red, and once a month after 10 sessions. Also, micro needles should be disinfected and cleaned and should not be used by people with severely allergic skin.