Features CEMENTED CARBIDE MATERIAL: The upper and lower rotation composite trimming milling cutter is made of premium cemented carbide material and is suitable for pressing, plywood, oak, MDF, and any hardwood processing. COMPATIBLE WITH: Flush Trim Router Bit Set is used for portable engraving machines, hand and table assembly, CNC and other automatic engraving machines, etc. FINE WORKMANSHIP: Incisive cutting edge, used for even groove. even cutting, hole, circulation and nut, cutting has clean edge and top surface, better than straight point. APPLICABLE MATERIALS: This router bit can be used with wood, medium density fiberboard, particle board, and dense plywood. It should not be used to cut black metal or other materials like steel, iron, sand, etc. WIDELY USED: This 1/4 shank trim bit has a wide range of uses, including kitchen and bathroom doors, office cabinets, floor tables, bedroom shelves, frames, and walls. Specification: Item Type: Flush Trim Router Bit Set Material: Cemented Carbide Specification: Upscrew 1/4in x1/4in x1 1/8in x3in (inches); Unscrew 1/4in x1/4in x1-1/8in x3in (inches); Composite 1/4in x1/4in x1 x3in (inches) Package List:3 x Router Bit 3 x Storage Box  Package List 3 x Router Bit 3 x Storage Box