The Vortex 5C Metric Lathe Collet - Round Bore - 5mm is a soft collet designed to be bored to a precise size, depth, taper, or shape to fit your component. Used in a 5C lathe collet chuck, pins keep the collet open during boring, enabling clean preparation for your part. Once bored, these collets can be re-bored multiple times to accommodate larger parts—so be sure to keep the pins for repeated use. Re-boreable bore for on‑demand sizing: The soft material is intended to be bored to your exact diameter, and can be re-bored later to handle bigger parts, maximizing flexibility and reuse. 13–15 micron runout for consistent results: Tight runout delivers reliable gripping and repeatable performance across multiple setups and jobs. Open‑bore stability with pins during boring: Pins hold the collet open during the boring process, ensuring a stable setup and easier reuse when your projects evolve. Designed for engineers, machinists, hobbyists, and workshop teams, this collet helps you tailor your bore to the part you’re producing while maintaining dependable, repeatable clamping. The ability to bore to exact specifications, then re-bore for larger parts, reduces downtime, minimizes waste, and integrates smoothly with standard 5C lathe chucks for reliable daily use.