Features Premium Metal Material: The collet is made of high grade specially formulated spring steel. High Accuracy: It was hardened and accurate ground makes the collet applicable to high accuracy process. Professional Made: High accuracy and large chuck force, the collet is is high tensile strength. Exquisite Workmanship: The CNC collet has high precision, high elasticity, stable cutting and tight clamping. Widely be Used: The collet is widely used in CNC, milling machine, engraving machine, machining center and other equipment. Specification: Type: 1mm 2mm  3mm  4mm  5mm  6mm  7mm Material: 65Mn Spring Steel Accuracy: 0.008mm Concentricity: 0.008mm Package List: 7*CNC Collet Package List