1.Handy carrying case, compact musician repair repair kit, suitable for beginners or 2. Applicable: Guitar / Bass / Mandolin / Banjo 3. Includes all string changes and settings, perfect for maintaining and keeping your instrument in perfect performance. Change string, set tone, adjust action, check string height, etc 4. Guitar files vary in shape, equal to flat, round, and semi-circular. 5.String Action The ruler measurement tool can be used on both sides. It's easy to read, so checking and adjusting string actions is a breeze. Screwdriver: You can adjust the length of the screwdriver and replace the head by pressing the round iron in the middle of the screwdriver. String Organizer makes it quick and easy to change strings. Material: Metal,Plastic Color: Black Package Size:20 x10 x5cm / 7.9 x 3.9 x 2in Weight: 120g Package Contents: 1 * Fret Rocker Leveling Tool 1 * String Organizer 1 * Steel String Ruler 1 * String Action Ruler Gauge Tool 3 * Hex Screwdriver 3 * Guitar Files 1 * Screwdriver 1 * Package box 1 * Guitar Fret File 2 * Guitar Fingerboard Guards 1 * Mutifunction Screwdriver 4 * Guitar Strap Washer Only the above package content, other products are not included. Note: Light 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.