7PCS ER11 5mm Motor Shaft Holder Extension Rod ER11 1-7mm Spring Collets Set

1、Made of high grade specially formulated spring steel, durable in use.2、Professional manufacturing, exquisite workmanship, high reliability.3、Built in self-release design and tools will never get stuck in holder.4、Use with any standard ER collet chucks for coolant-thru tool applications.5、Widely used for boring, milling, drilling, silk attack, sculpture, CNC, and other processing.