ER20 1/8 Inch High Precision Spring Collet 0.008mm Accuracy CNC Chuck 1 PC

No need for tools, just with your bare hands, the spring collet can be effortlessly installed and disassembled. Material: 65Mn spring steel，Hardness: 55HRC. This ER20collet set is an ideal addition for CNC milling lathe tools and work holding engraving machine.