HOSCO LUTHIERS TOOLS Fret Slot Cleaning Saw Double-edged Blade Thick from Japan 

Description

This is a small saw that is useful for removing dirt, dirt, adhesive, etc. that gets stuck in the fret grooves when refrretting. It can be held like a pencil and has excellent workability.
The two upper and lower blades are designed to cut in the pulling direction and pushing direction, respectively, so you can work without changing the direction of the neck, making it more efficient.

Blade thickness 0.50mm
Blade length 15mm each