YGCQFH Guitar Truss Rod Wrench Set 2 Pcs, Allen Set, Includes 4mm 5mm Lengthened Ball End Wrenches, Suitable for Martin Acoustic Guitars & Bass, Precision Adjustment

Varied Size Selection: 4mm & 5mm. Made of carbon steel & sturdy. Used to adjust the guitar neck straight, suitable for Martin acoustic guitars or other guitars that cannot reach with a regular hex wrench for truss rod adjustment Durable Construction: Made from high-quality steel, these Allen wrenches are tough and long-lasting. They resist breakage, ensuring that your guitar is always in prime condition User-Friendly L-Shaped Design: The L-shaped wrenches make it easy to insert into the soundhole for precise truss rod adjustments. The extended length facilitates use in tight or deep spaces Deep Reach Design: Specifically designed for the deep adjustments required by Martin guitars, this tool maintains neck straightness and stability. It also works well with various other instruments, including electric guitars and basses Broad Applicability: This versatile tool is not only perfect for acoustic guitars but also useful for automotive, bicycle, and plumbing repairs