- Function: By turning the tuning pegs, the strings are tensioned or loosened to change the pitch produced during playing, achieving accurate tuning. - Feature: Cello tuners add more fine tuners to your instrument, making tuning easier and producing a fuller, more sonorous tone. - Application: Suitable for 4/4 cellos and used to attach the strings in the swirl box of a string instrument. - Portable: Lightweight, easy to carry and store. Four pieces per pack, very practical. Use scenarios: - In practice sessions, replace worn or missing pegs to achieve quick, reliable tuning adjustments. - On stage or while traveling, use as spare pegs for fast replacement to maintain pitch stability. - During instrument setup for a 4/4 cello, install to ensure strings are properly attached in the swirl box and ready for tuning.