Applies to all types of musical instruments grind smooth polished leveling frets labor necessory to use small part small thingsUseful for luthiers, guitarists, and DIY for many fret works .Prevents scratching or damaging to guitar or bass neck when filing and polishing frets.Useful for luthiers, guitarists and DIYers for many frets.Comes with 2pcs fret protectors, one is wide and the other narrow. Item Descriptions:-Great way to touch up frets Conforms to frets to give a nice rounded profile-Foldable stainless steel neck protector.-Comes with 2 neck protectors, one is wide and the other is narrow.-Prevents scratches or damage to the guitar or double bass when filing and polishing the frets.-After Bending or polishing with the grinding wheel and fret protectors, it will give us a nice smooth feel or smoothness.-Useful for luthiers, guitarists and DIY enthusiasts for many frets.-Applies to all types of musical instruments grind leveling friezes gently polished labor required to use a small piece of small things .-Large cargo protector Size: approx. 7.5x2cm (L x W) - Narrow fingerboard guard Size: approx. 7.5x1.2cm (L x W)Package:2 x Sleeve Protector (different size) Note: The data are all manual measurement, please allow 1-3cm error, due to The light and display difference, there will be some color difference, depending on the physical item received.