•This portable wench could tighten or loosen most nuts or thumbs found on guitars such as the output jack, control pot, pickup switch, tuning machine and bridge thumbwheels •All edges and surfaces are beveled and polished to prevent damage to the body and surrounding areas •Good multi-tool for electric guitar bass repair, one end of the multi-spanner is designed for loosening, and the other is designed for tightening. •All are made of high-quality stainless steel, ensuring longevity and strength, sturdy, corrosion resistant and durable for long-time use •Small and light, easy to carry and use. You can put this small metal wrench in your guitar cases or other places Package included: •1 x Guitar Spanner Wrench