Using the right tool to perform the basic adjustments of your instrument is more than useful and necessary. The Music Nomad Premium Truss Rod Wrench is filled with unparalleled features and advantages. Its construction from carbon steel provides you with the quality you need every time, while the ergonomic design of its handle provides comfort and ease of use. The protective rubber "guard" prevents the metal handle from blocking on the side of the truss rod cover. It also features a magnetic screwdriver for the small screws found on the cover of the rod. With a size of 1/4", it fits perfectly with Taylor Guitars, Guild Guitars, and many others.