High quality material: high quality steel rod, light and flexible, wear-resistant and durable, high strength and high hardness. Excellent performance: The chuck has a great ability of precision engraving and clamping tight and stable, which can improve work efficiency. Standard Size: The milling chuck has 3 different internal diameters, including 6mm, 6.35mm and 8mm. The height is 20mm. Wide ApplicationThe cutting chuck is suitable for engraving machines, engraving cutters, woodworking cutters, woodworking cutters, etc. Excellent value for money: Comes with 6 milling adapters in 3 different sizes, 2 of each size. Sufficient quantity and different sizes can meet your different needs. Features: The tool holder is made of high quality steel, with good flexibility, stable performance, high strength and high hardness, wear resistance and durability. 3 different sizes of nozzle adapters (6mm, 6.35mm and 8mm) can meet your different needs in your daily work. Specifications: Material: Steel Package includes: 2 x 6mm collet adapters, 2 x 6mm collet adapters, 35mm clamps, 2 x 8mm. Please review the product information before purchasing.