High Quality: This tool set includes both fret rocker leveler and notched straight edge, which are made of high quality stainless steel. Guitar Neck Straightness Check Tool: The two sides design of the neck notched straight edge could work with most electric or acoustic guitars, and it is a ideal tool set to ensure your guitar fret board straight and flat. Fret Rocker: Fit for electric guitar, acoustic guitar, bass, mandolin, banjo, folk guitar, electric box guitar etc. Luthiers Tool : It is a necessary tool set for guitar players, which is stable,durable,beautiful and widely used. Nice Gifts: These guitar luthier tools are good gifts to guitar technicians and guitarists to maintain and repair their instrument themselves in a short time, reducing buzzing. Specification: Material: Stainless Steel Size Chart: Fret Rocker:4cmx2cmx0.2cm/1.57inchx0.79inchx0.08inch Neck Straight Edge: 42cmx3.7cmx0.35cm/16.54inchx1.46inchx0.14inch Package Includes: 1 Fret Rocker 1 Neck Straight Edge Note: Please allow slightly errors due to manual measurement and different monitors.