Feature:1. 9Pcs in 1 Set: Comes with 9pcs collet in different sizes, which will satisfy your various working needs.2. Stable Working: Has high elasticity and great resistance to tension to ensure stable work performance.3. Firm Clamping: International opening standard enables firm clamping without slipping, safe and reliable.4. Good Material: Forged with high speed steel, not easy to deform or crack, rustproof in long term using.5. Practical Use: Allows for wide application in CNC, engraving machine, milling lathe, etc., very useful.Specification:Item Type: ColletModel: SKER89PC01Material: High Speed SteelAccuracy: 0.005mmSpecification: Approx. 1mm / 0.04in1.5mm / 0.06in2mm / 0.08in2.5mm / 0.1in3mm / 0.12in3.5mm / 0.14in4mm / 0.16in4.5mm / 0.18in5mm / 0.2in.Package List:9 x ColletNote:Generally, the collet is marked with the number of the clamping diameter, such as 5, which means that the clamping diameter of the collet is 5mm.