Omega's ER11 Collet Ultra Precision is a high-precision tool-holder designed for ER11 collet chucks. It's ideal for machinists, engineers, and hobbyists who demand repeatable accuracy when using small-diameter tools. With a 5 micron run-out, this collet helps maintain concentricity, delivering consistent results in precision milling, drilling, and micro-machining. 5 Micron Run-Out: Delivers ultra-tight concentricity for small-diameter tools, reducing run-out errors during high-precision milling and drilling. Small Shank Compatibility (1.0–1.5 mm): Optimized for clamping 1.0–1.5 mm round tool shanks in an ER11 chuck, providing secure grip and repeatable clamping force across setups. Durable, precision-ground construction: Hardened steel body with accurately ground internal geometry ensures stable grip and minimal deformation under load, preserving accuracy at high speeds. With the Omega ER11 Ultra Precision Collet, you’ll experience improved workflow: tighter run-out means cleaner cuts and more consistent finishes, while secure clamping reduces downtime from tool slips. The durable construction lowers maintenance needs and replacement frequency, making it a reliable choice for CNC milling, drilling, engraving, and other precision tasks. Invest in this collet to achieve repeatable performance, tighter tolerances, and better overall results across your machining projects.