1. Allinone tool: We have launched a guitar string change tool that integrates three functions—wire winder, wire puller, and needle puller—allowing you to change strings comfortably. 2. material: This guitar string cutter is made of quality ABS and metal materials, ensuring a long service life. The unique opening design of the needle puller makes it easy to remove the cone and maintain your guitar. The sophisticated design of the thread cutter smooths the gap of the cut cord, preventing hand discomfort. 3. Take it wherever you go: The welldesigned guitar winder weighs only 33 grams and measures 11.5 cm in total length, making it lightweight and portable. Whether you store it in your guitar case or carry it with you, it meets your string adjustment needs anytime. 4. Wide applicability: Our guitar string adjusters are suitable for all types of string instruments, including guitar, banjo, acoustic guitar, mandolin, ukulele, bass, and more. Whether you're an amateur or a professional musician, you can benefit from it.