Feature: This pocket-size toothed wench will tighten or loosen most nuts or thumb wheels found on guitars, like output plug, control pot, pickup switch, tuning machine and bridge thumbwheels. Use the measurement and adjustment of the guitar's strings to make the guitar sound better. Easy to use, very suitable for guitar lovers, or a tuner. Keep your guitar adjustable and easy to maintain. The top is very suitable for your special construction or repair work. It's very easy to install new ones, and it can be adjusted to compact so that your guitar sounds are stable. Specification: Material: Stainless steel Color: Silver Product dimension: 9.3*2.7cm / 3.7*1.1in Package list: 1 * Guitar Spanner Wrench Tool Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. 1、This pocket?size toothed wench will tighten or loosen most nuts or thumb wheels found on guitars, like output plug, control pot, pickup switch, tuning machine and bridge thumbwheels. 2、Use the measurement and adjustment of the guitar's strings to make the guitar sound better. 3、Easy to use, very suitable for guitar lovers, or a tuner. 4、Keep your guitar adjustable and easy to maintain. The top is very suitable for your special construction or repair work. 5、It's very easy to install new ones, and it can be adjusted to compact so that your guitar sounds are stable.