Spring Collet Precision Collet Chuck Set ER8 ER16 ER20 ER25 ER32 ER40 For CNC. ER20 Spring Collet For CNC Engraving Machine Milling Tool Holder 1-13mm 13PCS. 1 Set Collet Chuk. Clamping force, clamping range, specifications complete,high precision.Widely used in wire, milling, boring, dilling,tapping, CNC, carving, spindle machine, such as processing work.
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