21Pcs ER11 1-7mm Spring Collets with ER11A 5mm Motor Shaft Holder Extension Rod

ER11A 5mm Extension Rod Height: 38 mm(when the lock nut) Shaft Hole: 5 mm (+0.02 mm) the need to install heating expansion ER11A Nut: Outside hexagonal nut 19 mm maximum overall diamete Hardened and precision ground Built in self-Release design and tools will never stuck in holder Widely used boring milling drilling silk attack sculpture CNC and other processing. Use with any standard ER collet chucks for coolant-thru tool applications. Each collet is well packed in separate protective container with label. Colour: Silver Material: Carbon steel Note: The color of package is random t accept the specified color. Package Contents: 3 * Extension Rod 21 * ER11 Collets Only the above package content other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.