Used for chuck conversion of trimming, engraving machines. Made of carbide, high strength and hardness.Processing by heat treatment and precise grinding, to use. It's split bushing converters for multiple purposes of chuck or collet sutability. Suitable for engraving machine, wood router.A perfect woodworking tool. Collet Chuck Adapter only, other accessories demo in the picture is not included., Weight: 0.01763698096 pounds, Manufacturer: Histeaa