Great compatible with electric guitar/bass luthiers repair tool.High quality brass material, electroplated surface finished, bright and shiny, long service life.Help you to press in frets on any string instrument. Just place the right insert in the caul.The groove on the one side to prevent the fingerboard wire from sliding off, and marks on the inserts, easy to identify and use.Pressing frets into a guitar fretboard has the advantage over hammering that the entire fret is pressed in one operation, eliminating the possibility that an end will not be seated right, or the hammering could cause the fretwire to decompatible withm.Radius of Inserts: 7.25 radians, 9.5 radians, 10 radians, 12 radians, 14 radians, 15 radians, 16 radians, 17 radians, 20 radiansClamp size: 110 x 64 x 14mm / 4.33 x 2.56 x 0.55inBrass Radius Insert Size: 6.3x1.1cm/2.48inch x 0.43inch(LxW)Colour: black + goldMaterial: brassPackage Contents:1 * Self-leveling fret press caul1 * Hex wrench9 * Radian Fret Press CaulOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.