Feature: 1. Excellent Material: Collet chuck is made of alloy steel with high strength, high toughness, wear resistance, corrosion resistance and high temperature resistance. 2. Strong Performance: After heat treatment and cold drawing hardening, the collect set has relatively high strength, and has a certain degree of flexibility and plasticity. Under the same surface state and complete quenching, the fatigue limit is equivalent to that of a multicolor alloy spring. 3. High Accuracy: Collet chuck adopts internal and external fine grinding treatment, which makes the slot position smoother and has higher accuracy. Provide you with a better work experience. 4. Concave Design: The concave design in front of the collet cone can effectively prevent dust from entering during work and avoid affecting mechanical work. 5. Wide Application: Collet chuck is used in a wide range of applications and perfect for CNC milling lathe tool and work holding engraving machine. Specification: Item Type: Collet Material: Alloy steel Size: Approx.0.4mm / 0.02in, 0.5mm / 0.0197in, 0.6mm / 0.024in, 0.7mm / 0.03in, 0.8mm / 0.031in, 0.9mm / 0.04in, 1mm / 0.0394in, 1.1mm / 0.043in, 1.2mm / 0.05in, 1.3mm / 0.051in, 1.4mm / 0.06in, 1.5mm / 0.059in. Package List: 12 x Collet12 x Storage Boxes