Stewmac Z-File Guitar Fret Crowning File, Safe Edge Z-File Fast Cutting. Stewmac. Guitar Building & Luthier Supplies. 840014723584.
The Stew Mac centered Z-File is praised for its effectiveness in crowning frets and its ease of use. However, some users found it to be too centered, wearing out quickly, and not suitable for larger frets or deep grooves.
