Features: brand new and high quality Metal material, firm, rust proof, fine workmanship. Protect your guitar or fretboard from scratching or damaging while filing and polishing. A great addition to your guitar maintainence tool kit for sanding or polishing. for Ideal gift for most guitarists, players, luthiers. The Leveling File tools kit is Great for luthiers, guitarists, and many DIY fret work or maintainence. It's packed in a black portable bag for easy carrying. Specifications: Material: Metal and Stainless Steel Mixed Size Note: Please allow 0-1mm errors due to manual measurement, make sure that you do not mind before you order. Package includes: 10 x Guitar stainless steel fret crowning luthier files, 9 x Stainless steel understring radius gauges, 8 x Allen wrenches, 6 x Guitar bridge pins, 1 x Guitar string winder, 1 x String cutting pliers, 1 x Feeler gauge (from 0.0015 inch to 0.035 inch), 1 x 13 Different size stainless steel needle file, 1 x Stainless steel string action ruler, 2 x Fretboard fret protector guard, 1 x String spreader, 1 x Grinding sponge, 1 x Grinding stone, 1 x Wiping cloth, 1 x Carrying for case