ER20 Spring Collet, used for clamping cutting tools in manufacturing machines. It is used in CNC lathes, milling machines, and engraving machines for high-precision tool clamping. Features: Made of high-quality spring steel to ensure high durability, hardness, and corrosion resistance. Performance: Features high concentricity and a large clamping range to ensure stable performance during operation. Limit 60 collets of different sizes