Features: *100% new and high quality. *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 with Nut only, other accessories demo in the picture is not included. Specification: *Material: Carbon Steel *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 Package Contents: 1* Collet Chuck Adapter with Nut Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.