findmall Collet Chucks W. 4" Long Gage Length-4 Chucks Tool Holder Set 4pcs CAT40-ER20

Set of 4 high precision ER20 collet chuck Gage or projection length of ER20 is 4"(100mm) Accuracy in 0.0001-0.0002"max Fully ground flange and V-groove-easy on tool changers for less spindle Fit for Drilling Machine ,Milling Machine CNC Chuck or Holder