Specifications:

• Designation: ER20-8MM AAA 0.005

• AAA grade high precision elastic chuck ER20, ER collet lock

• Diameter : 21mm
  

• Height : 31.5mm
  

• With nut : ER20A

• Package Includes: A Chuck (not include With nut)

Features:

• Mn manganese-titanium hardened steel is made with precision, hardened, shock-resistant and durable  
• Good hardenability, can withstand multiple impacts, strong and durable, long life  
• The hollow knife groove of the collet is ground  
• The surface is nickel-plated, with high hardness and good wear resistance  
• The tail of the clamp is exquisitely made, and the outer circle and end surface are ground multiple times to achieve a mirror effect

ER20-8MM AAA High Precision Elastic Chuck – Durable, Shock-Resistant, and Ultra-Precise for Professionals

Top-Quality ER20 Collet Lock – Nickel-Plated for Maximum Wear Resistance and Longevity

Built for Impact Resistance and Unmatched Durability