Premium Material: Made of high quality carbon steel, durable. High precision and high toughness. Shank diameter: about 8mm, high strength and stronger. Head diameter: 18mm, 20mm, 22mm, 25mm, 30mm, 32mm. Professional: suitable for all types of routers such as hand routers and table top routers. Wide application: suitable for cutting all composite materials, plywoods, hardwoods and softwoods. Features: Can be used on the following materials: laminate, MDF, veneer, plywood, wood, etc. Suitable for all routers in the range such as portable routers and table top routers. Features: Dimensions: 8x18mm, 8x20mm, 8x22mm, 8x25mm, 8x30mm, 8x32mm. Material: Carbon Steel. Color: Red. Contents : Set of 6 straight router bits