⚙ Function:

✔ Made of high-quality spring steel with a special formula, durable in use.

✔ Professional production, exquisite workmanship, high reliability.

✔ Built-in self-release design and tools will never get stuck in the chuck.

✔ For use with all standard ER collets for tool cooling applications.

✔ Widely used for boring, milling, drilling, silk attack, carving, CNC and other processing.

✔ Spring sleeve model: ER11-1, ER11-2, ER11-3, ER11-4, ER11-5, ER11-6, ER11-7

⚙ Package List:

1 * extension cord

7 * spring sleeve