Musiclily Pro String Jack for Fretbar Understring Leveler Guitar Bass Fret Sanding Leveling, 6x100mm (Set of 2)

Use with the fretbar understring leveler, raise the strings during guitar bass fret leveling Length: 100mm (3-15/16 inch), diameter: 6mm (15/64 inch) Made of Polyoxymethylene (POM), high strength, stable and durable, good wear resistance Put the string jack in front of the nut to raise the strings, lets you level your frets under full tension without removing the strings Package includes: 2pcs string jack