Item Type: Guitar Machine Head Tuner Material: Metal 1,15:1 Gear Ratio: This knob allows for smooth tuning, and a threaded lock button on it makes it even more comfortable to use. 2,Perfect Tuning: This tuning knob can help your guitar produce the most accurate and beautiful tone and is an essential part of the guitar. 3,Standard Machine Head: This knob has a simple design, this design is not outdated, it is very classic, and it is a must have accessory for guitars. 4,Wide Compatibility: This knob has good compatibility and is easy to use, so don't worry too much about not being suitable for your guitar. 5,Metal Material: This knob is made of metal with a nice metallic luster, durable, easy to install and has a long service life.6 x Guitar Machine Head Tuner 6 x Stud 6 x Gasket 6 x Screw Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.