3-piece router bit set, router collet extension, milling and trimming collet extension, cutting and engraving machine extension, 1/4"/1/2"/8mm wood chuck, end mill

Extended body length: It can extend the length of the router bit body and add more flexibility to your woodworking projects to reduce costs and improve efficiency. Rigid metal: A hard metal is used, offering high rigidity and strong strength for long-lasting durability. Strong clamping force: Provides extremely strong clamping force to ensure stability during use. Application: Used for various machining applications, including drilling, milling, boring, tapping, and grinding. Contents: 1 x 1/4" router collar extension, 1 x 1/2" router collar extension, 1 x 8mm router collar extension.