Round bottom router bits create large rounded indents and can be plunged straight into the work. Suitable for wood, MDF, particle boards, plywood, panels, softwood, and other synthetic wood. Makes small bowls, coin trays, jewelry boxes, fly & tackles boxes and other projects. Bowl and tray router bits create large rounded indents in a variety of materials and can be plunged straight into the work. C3 micro-grain tungsten carbide blades, Sharp edge,high hardness,accurate positioning,high precision,smooth cutting,impact resistance,high toughness.