New lubricating oil application designThe -headed design, with two functions, can not only remove rust from the strings, but also add lubricating oil to the strings. The gray end is used for cleaning and the white end is used for lubrication.The anti-rust head is designed to remove rust stains on the guitar strings, allowing you to use the guitar strings for a longer period of time.The material of this guitar string cleaner is safe, environmentally friendly and non-toxic, so you can use it.When you touch the guitar strings, you feel a little uncomfortable. Therefore, you can use a rust remover to avoid rust and add comfort to your fingertips.This item is made of high-quality materials, durable and practical. Easy to use and long service life. The precise design will ensure its practicality in high-performance work. After use, the strings will become extremely smooth. It is a professionalcleaning tool for guitarists and guitar lovers.Package includes 1* rust removing pen