The blades of the router bit set are made of carbide, and the bearings are upgraded for longer life and edges. The router bits are designed for processing softwood, hardwood, and wood composites, which are sufficient for ordinary DIY enthusiasts and professional projects. Align the router bit shank with the corresponding size hole and insert it. You can load the tray into a tool box or drawer, or use strong double-sided tape to stick the tray anywhere you want to store it. [Note] When the router bit is working, the wood cannot be advanced too fast. Colour:Photo Color Material:Cemented Carbide Package Contents: 1set x Profile bearing trimming drill bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.