2006-2021 GM Automatic Transmission Fluid Pan 24297104 The groove on the bottom can prevent the fingerboard wire from sliding off. A professional and practical luthier repair tool for electric guitars. Specification: Material: 304 stainless steel Raidan: flat/7.25/9.5/10/12/14/16/20 Radius of Inserts: Flat/7.25/9.5/10/12/14/16/20 INCH for choose. Great for acoustic/classical/electric guitar, bass and other stringed instruments luthiers repair tool. Handheld version fret press inserts Fingerboard Handheld Fret Press Tool With Alloy Radius Inserts Guitar Luthier Making Repair Tool for Guitar Bass Ukelele Tool For Guitar Guyke Fet Pess Inset, 304 Stainless Steel Machine Fret Press Features: Material: 304 stainless steel, durable and anti-corrosion. Easy and accurate fretting on different radiused fretboards. Handheld version. Handheld version, easy to use. Material: 304 stainless steel , durable and anti-corrosion. Great for acoustic /classical/ electric guitar, bass and other stringed instruments luthiers repair tool. Easy and accurate fretting on different radiused fretboards. The inserts with groove side to prevent the fingerboard wire from sliding off. Machine version Warm Tips: There might be 1-3mm error in the manual measurement. Material: 304 stainless steel, durable and anti-corrosion. Suitable for luthiers, guitar craftsman, amateurs, etc.