This 4PCS acne needle set is made of stainless steel and is designed for removing blackheads, acne, and other skin imperfections. The set includes four different tools with varying head types to suit different skin care needs. The tools are easy to use and clean, and are designed for comfort and precision. To use, simply place the loop end over the top of the blackhead and press it gently. It is recommended to clean the skin before use and to clean the extractor with cotton and alcohol after use.