26-piece guitar repair tool set for guitar repair and maintenance - Includes: wire cutter, string organizer, fretboard protector, hex keys, files (flat, round, and half-round), string ruler, screwdrivers with adjustable length and interchangeable heads by pressing the round metal piece in the middle, and saddle pins for guitar, ukulele, bass, and mandolin - Compatibility: suitable for E-Guitar, bass, mandolin, banjo, ukulele, acoustic guitar, and other stringed instruments - Comprehensive maintenance: contains everything needed for string changes and setup to keep your instrument in perfect playing condition - Key tasks supported: string changes, intonation adjustment, action adjustment, string height check, and more - Tool specifics: fret files available in flat, round, and half-round shapes for precise shaping and leveling - Reading aid: string ruler can be used on both sides and is easy to read for quick checks - Screwdriver feature: length can be adjusted and the head exchanged by pressing the round metal piece in the middle - Quick-change aid: the string organizer speeds up string changes and simplifies workflow - Fretboard protection: fretboard protector safeguards your guitar or bass fretboard from scratches or damage during filing and polishing Use scenarios - At home studio: perform routine string changes on electric guitars, basses, or acoustics and complete setup tasks in one kit - Maintenance workflow: adjust intonation and action on various instruments to achieve optimal playability and tone - On the go or teaching environment: maintain multiple instrument types such as mandolin, ukulele, and banjo with a single portable tool set