Features : - Guitar tools:Suitable for Luthier, string Instruments user, guitar, DIY tools for many workers.  - Guitar tool kit:Make the necessary measurements and adjustments on acoustic and electric guitar, bass, banjo, mandolin and other stringed instruments.  - Guitar tool set - specifically created to help complete the most common guitar repairs and adjustments. It includes some of the most useful, popular and sought-after tools for maintenance and repairs, complete tools, affordable, high quality.  - Guitar files are in various shape, equaling flat, round, half round.  - String Action Ruler Gauge Tool could be uesd on both side. It's easy to read, so checking and adjusting string action will definitely be a breeze.  - Screwdriver:you can adjust screwdriver's length and exchange its head by pressing the Round Iron - Piece in the middle of the screwdriver - String Organizer makes changing strings quick and easy.  - Guitar fingerboard guards for protecting your guitar or bass fretboard from scratching or damaging while filing and polishing.  - Muti Spanner Wrench will tighten or loosen most nuts or thumb wheels found on guitars, like output jack, control pot, pickup switch, tuning machine and bridge thumbwheels.  - Guitar wire plier is suitable for cutting soft alloy/copper/iron wires, guitar strings, cable ties, pins of electronic componen.    Specifications: Bag Size:About 20cm * 10cm / 7.9" * 3.9";  Material:Stainless Steel + Plastic;    Package Includes: 3 * Needle File;  1 * 2-in-1String Action Gauge;  1 * 2-in-1 String Winder;  3 * Hes Key;  1 * Screwdriver;  1 * Ruler(15cm);  1 * Bag;  2 * Guitar Fingerboard Guards;  1 * Guitar Fret File;  1* Leveling Ruler;  1 * Piano Pillow File;  1 * Arc Ruler