【Essential Woodworking Tools】: They can be used as adapters for cutting knives, suitable for a variety of cutting knives and meeting the needs of woodworking. 【3 Models】: The set contains a total of 6 pieces of collet chucks, which are divided into three sizes: 6 mm, 6.35 mm and 8 mm, 2 pieces for each size. Rich models can meet your different needs. 【Good Quality】: The chuck is made of high-quality carbon steel with high hardness and high wear resistance. It is not easy to corrode and can be used continuously for a long time. 【Easy to Use】: The chuck only needs to be cleaned with gasoline or cleaning agent before installation, it is particularly easy to use. 【Wide Uses】: Tool collet adapter suitable for engraving machines, woodworking milling machines, cutting engraving machines, etc. 【Description】 1. When loading the knife, clean the chuck and pressure cap with detergent (gasoline is also allowed). Make sure the tools are clean and free of debris before installing them. 2. Portable, high precision, tight and stable clamping, improve work efficiency. 3. Suitable for engraving machine, wood router. Perfect woodworking tool. 【Specification】 Material: Steel Color: Silver Black Card Head Size: 8mm, 6.35mm, 6mm 【Package Includes】 6x Collet Adapter 【Note】 1. For manual measurement, please allow an error of 1mm. 2. The color may vary slightly due to lights, screens, etc.