The Wittner Large Cello FineTune Pegs offer stable tuning to touring musicians crossing different climates. The FineTune pegs feature a composite alloy exterior thats durable against frequent use. The peg box features a specific cog mechanism that prevents it slipping or turning by accident. This model benefits from no climate-temperment materials for reliability when gigging in venues of different temperatures. The FineTune pegs come in a pack of four and are a necessity for the serious touring musician.