The COL ER set includes 23 pieces of ER40 collets, designed for versatility in machining applications. Each collet is crafted from high-quality materials, ensuring durability and precision. This comprehensive set accommodates a range of tool sizes, making it ideal for various milling and CNC operations. The ER40 design allows for easy tool changes and secure gripping, minimizing slippage during use. Each collet is engineered to meet industry standards, providing reliable performance for both professional machinists and hobbyists alike.