Take it from Dan Erlewine, "A fret won't seat well if its slot isn't clean!" We developed this tool to effectively scrape away wood chips and old glue, for better fret seating.
The Fret Slot Cleaning Tool comes with 2 chisel blades. Additional replacement blades are sold separately.
This 5-1/2" Fret Slot Cleaning Tool has a comfortable handle with a metal collet, and a replaceable hooked .019" thin square-edged chisel that gets into the corners of the slots on bound fretboards. It can be used to scrape the bottom and the wall of the fret slot, and when the tool is held with both hands for control, it pries up dried glue.