This is a violin tuner made of high-quality metal. It is easy to carry, exquisite design, and strict quality supervision, which can perfectly meet the tuning needs of violin beginners. Features -Color: Black -Material: Metal -Size: About 2.20x2.20x0.60cm/0.86x0.86x0.24inch -Easy to disassemble the bottom bracket, accurate positioning, not easy to fall off. -Using groove design, can be adjusted without slipping. -Function: Fine-tune the pitch to make the violin string pitch back to the correct. -Fine craftsmanship, high gloss surface, very special and beautiful appearance, does not change color and is easy to match with your musical instrument. -High-precision screws work smoothly. Easy to install on the violin. Packing list: 4 x violin string adjuster