One of the key benefits of using a guitar tuner washer is that it can help to reduce string slippage, which is a common problem that can affect the sound and playability of your guitar. By providing a more secure fit for the string, a guitar tuner washer can help to prevent the string from slipping out of tune, allowing you to play with greater precision and control. Features - Color: Black -Material:Metal and synthetic plastic - Size: 1.40X1.40X0.20cm/0.55X0.55X0.08in -The guitar tuner washer is easy to take with you wherever you go, can always have it on hand when you need it. -You can quickly and easily replace your old washer and get back to playing your music. -The guitar tuner washer ensures that it will stay in place and keep your guitar in tune for longer periods of time. -The guitar tuner washer make it a reliable and effective accessory for guitar players. -The excellent durability of the guitar tuner washer means that it will last for years. Package list: 10 x Washers 20 x Screws