Features: The Polishing gasket prevents the fretboard's wood chips from being carried out when removing the frets, making fret removal less careful. Protect your guitar or fretboard from scratches or damage when filing and polishing. The strap design, you can tie the elastic rope to prevent it from falling off, which is convenient and simple. Suitable for guitar, , ukulele, mandolin and other similar instruments. Package Includes: 2x Polishing Gasket, 1x Whetstone. Specifications: Material: Metal Style: with Blue Polished Stone/with Red Polished Stone Large: Approx. 81x22mm/3.19x0.87inch Small: Approx. 81x13mm/3.19x0.51inch Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2x Polishing Gasket 1x Whetstone