STANDARD SIZE: The wrench head is designed as a 5/16 7mm hex socket, suitable for most common guitar screw specifications Fine Processing: The product undergoes a fine process, the surface is smooth, avoiding scratches and other damage to the guitar SUPERIOR MATERIAL: Made of metal material, this product is sturdy and can be used for a long time without being damaged easily MULTIFUNCTIONAL USE: Guitar Metal Wrench 5/16 7mm Hex Socket Guitar Wrench is a multi-functional tool for adjusting guitar of various types and brands PRECISE TUNING: This wrench has the right size to accurately adjust the height of the guitar strings and other important components, helping guitarists achieve their desired sound, Manufacturer: Tizuqe