【Set Contains】 The set contains a total of 6 pieces of clamping machine chucks, divided into three sizes: 6 mm, 6.35 mm, and 8 mm, 2 pieces for each size. Rich models can meet your different needs. 【High-Quality Materials】 The chuck is made of high-quality high-speed steel with high hardness and high wear resistance. Not easy to corrode and can be used continuously for a long time. It is not easily damaged under normal working conditions and is your best choice. 【Easy to Use】 Before installation, you only need to clean the chuck with gasoline or detergent, which is particularly convenient. There are no unnecessary steps, which can greatly improve your work efficiency. Save precious time. 【Necessary for Woodworking】 They can be used as adapters for cutting knives, suitable for a variety of cutting knives, meeting the needs of woodworking. 【Widely Uses】 The tool chuck adapter is suitable for engraving machines, woodworking milling machines, engraving machines, etc. Whether it is a