Features Made of high quality spring steel, they are stable in performance For CNC milling machines and workpiece engraving machines Fine workmanship, good elasticity, high precision The collet must be installed in the collet nut before inserting it into the collet nut Each collet is well packaged in a separate protective case with a label We support our best service, high quality products, if you have any questions about our products, please do not hesitate to contact us, we will try our best to help you and reply within 24 hours. Description: These spring collets are made of high quality 65Mn spring steel for CNC milling lathes and workpiece engraving machines. The set contains a total of 9 collets of different sizes, which can basically meet your needs. Each collet is well packaged in a separate protective case with a label so you can easily tell them apart. The collet must be installed in the collet nut before inserting it into the collet nut. Features: Made of high quality spring steel, they are stable in performance. Fine workmanship, good elasticity, high precision. The collet must be installed in the collet nut before inserting it into the collet nut. Each collet is well packaged in a separate protective case with a label. For CNC milling machines and workpiece holder engraving machines. Specifications: Material: 65Mn spring steel Model: ER32 Range: 2mm, 4mm, 6mm, 8mm, 10mm, 12mm, 16mm, 18mm, 20mm Height: 40mm/1.57inch Outer Diameter: 31mm/1.22 inch Runout Tolerance: Package List