Our ultra high precision ER8 collets are designed to securely clamp round shank tools in an ER8 collet chuck, delivering consistent, high-accuracy results in precision machining. With a 5 micron run-out, these collets help maintain concentricity and reduce deviation across cutting and finishing operations. 5 micron run-out: Delivers ultra-precise concentricity to improve cutting accuracy and repeatable results across cycles. ER8 chuck compatibility: Fits standard ER8 collet chucks for quick setup and secure, stable toolholding during demanding machining tasks. Reliable clamping for round shank tools: Keeps tools firmly gripped throughout operation, minimizing movement and enhancing surface finish consistency. These ER8 collets help you streamline setups, improve part quality, and reduce rework by providing stable, precise toolholding. Ideal for engineers, machinists, and hobbyists who demand consistent results in milling, drilling, or finishing work.