4 Pcs CAT40-ER16 Collet Chuck Tool Holder Set 4" Gage Length for CNC Engraving Machine Milling Lathe

4Pcs CAT40-ER16 collet chuck 4" TIR: 0.0001" With good centering function, mainly clamping straight shank cutter It is often used for clamping end milling cutter, drill bit, tap, reamer, center drill and other cutting tools Package included 4 pcs CAT40-ER16 collet chucks