Product description: Quantity: Three-piece Product name: Conversion chuck for trimming machine. Product use: Used to reduce the diameter of the shank when machines hold cutters. Product material: carbon steel Product weight: 6mm:2.7g 6.35mm: 2.7g 8mm:1.5g High Quality MaterialsCollet chuck made of hard carbide, good flexibility and high durability, and stable performance. Suitable SizeCollet Chuck Dimensions: 8mm, 6.35mm, 6mm, 3 sizes can meet different needs. Efficient and PracticalChuck collet adapter, lightweight and easy to carry, improves work efficiency, is the perfect choice for woodworking. Split Ring ConverterHigh precision and good stability, strong clamping force, suitable for converting engraving machines and wood milling spindles. p> Multi ApplicationSuitable for installing and converting engraving machines, cutting machines, milling cutters and wood router bit, cutting tools and engraving heads to expand the application range of heads fixed engraving.