1. DURABILITY MATERIALS: Made of 40Cr and carbon steel materials, with carburizing and quenching process, high hardness and strength.
2. INTEGRATED FORMING: The inside and outside of the tool holder are integrally formed, fine control processing, with stable performance.
3. Inner hole grinding treatment, has high concentricity, suitable for machine tool processing.
4. CLAMPING RANGE: The clamping range of the is 1‑7mm, standard in size, and it is suitable for ER11 collet.
5. WITH WRENCH: Equipped with a wrench, stable in processing, and can effective vibration suppression.

Specification:
Item Type: Extension Rod
Product Material: 40Cr + Carbon Steel
Hardness: 45-46HRC
Head Diameter: Approx. 19mm / 0.75in
Clamping Range: Approx. 1-7mm / 0.04-0.28in
Collet: ER11
Thread Type: A
Tool Shank Diameter: Approx. 16mm / 0.63in

Package List:
Tool Holder x 1
1 x Wrench

Note:
1. Incorrect assembly may damage the accuracy of the nut and spring
2. Only the matching collet chuck can be used to assemble the nut
3. Do not clamp tools that exceed the clamping range