["brand new and high quality Features: It's split bushing converters for multiple purposes of chuck or collet sutability. Made of carbide, high strength and hardness. Processing by heat treatment and precise grinding, durable to use. Used for chuck conversion of trimming, engraving machines. Suitable for engraving machine, wood router. A perfect woodworking tool. Collet Chuck Adapter only, other accessories demo in the picture is not included. Specification: Material: Carbon Steel Package Size: app.30x30x50mm/1.18x1.18x1.97in Chuck Size: 8mm,6.35mm,6mm (0.31inch, 0.25inch, 0.24inch) Nut Size:13mm12mm7mm/0.51in0.47in0.28in(Suitable for 6mm/6.35mm chuck) 13mm12mm8mm/0.51in0.47in0.31in(Suitable for 8mm chuck) Colors: As pictures shown Quantity: 1 Set Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Collet Chuck Adapter"]