Industrial CasterChina High Accuracy 0.015mm DIN6499b Er Spring Collet Chuck Er40 3-26mm 24PCS Collet Sets with Aluminum Box for CNC Milling Machine, Find details about China CNC Machine Tools, Er40 Collet Sets from High Accuracy 0.015mm DIN6499b Er Spring Collet Chuck Er40 3-26mm 24PCS Collet Sets with Aluminum Box for CNC Milling Machine