Omega Products ER11 Collet Ultra Precision delivers exceptional clamping accuracy for round-shank tools in an ER11 collet chuck. Built for machinists and hobbyists alike, it helps you achieve ultra-high precision in every pass, with a stated 5 micron run-out that minimizes runout-related errors and improves consistency across parts. 5 micron run-out: Delivers exceptionally tight concentricity for cleaner cuts, tighter tolerances, and repeatable results across multiple parts. ER11 compatibility: Designed to drop into standard ER11 chucks for quick upgrades and reliable, secure tool holding with minimal setup. Durable, precision-ground construction: Built to endure demanding machining environments, reducing downtime and maintaining accuracy over time. This ultra-precision collet helps streamline your workflow by delivering consistent performance from setup to finish. With reliable grip on round shanks and a focus on precision, you can expect less rework, improved surface finish, and greater confidence across repeatable machining tasks.