Specifications:This item is used for chuck conversion of trimming machine and engraving machine.The 1/4 (6.35mm) type is mainly used in Europe and America, and 6mm/8mm type is mainly used in Middle East countries, Russia and Germany.Made of high quality material, it is useful and durable.Type: Collet ChuckQuantity: 1PcMaterial: Carbon SteelFeatures: Anti-Rust, Strong, UsefulDiameter: A: 6mm/0.24", B: 6.35mm/0.25", C: 8mm/0.32" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Collet Chuck