Features: Made of high-quality aluminum alloy, CNC-machining, and subjected to good oxidation sandblasting treatments. You will level most of the frets on the neck quickly and evenly. Leveler lets you level your frets under full tension without removing the strings. You can level your frets with the strings ON . Used with the strings on or off, the precision-ground-surface works quickly and accurately to get frets level. The length of 4.5 inches (114mm) is very suitable for leveling problematic frets on the entire neck. It is also very suitable for creation the failure of the acoustic guitar.The length of 2.9 inches (228mm) is designed for smaller necks, such as ukuleles and mandolins. It is also suitable for full-size leveling. The neck and the scene are leveled. 18 inches (457mm) can easily level the entire neck. Applicable for fret, saddle, and fingerboard sanding, great accessory for players and luthiers. Suitable for the fret leveling of electric guitar, acoustic guitar, electric bass, mandolin, etc. Specifications: Material: Aluminum Alloy 114 Size: Approx.114x38x19mm/4.49x1.50x0.75inch 228 Size: Approx. 228x38x19mm/8.98x1.50x0.75inch 350 Size: Approx. 350x38x19mm/13.78x1.50x0.75inch 457 Size: Approx. 457x38x19mm/17.99x1.50x0.75inch Package Includes: 1x Guitar Fret Leveler note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.