Usage Tips:SIZE AND MATERIAL: Made of professional grade carbide, this set of milling cutter bits features a 1/4-inch steel shank, 1/4-inch cutting diameter, and 1/8-inch cutting radius for durability and efficient material removal. CARBIDE CONSTRUCTION: Each bit in this set is made of iron and carbide tips designed for more efficient material removal. The sturdy construction ensures long-lasting durability and performance in a variety of routing tasks. VERSATILE USE: These router bits are perfect for making semi-circular grooves in solid wood, plywood, MDF, acrylic and PVC. They are perfect for creating fluted molding, columns, woodwork and signage to increase the versatility of your woodworking projects. COMPATIBILITY AND USE: Suitable for handheld, benchtop and CNC routers, these bits can be used with edge guides to cut notches, making them a versatile addition to your woodworking toolkit. They are designed to precision and ease of use in a variety of applications. PROFESSIONAL WOODWORKING TOOLS: Cut precise half-round flutes for fluted molding, columns and other decorative woodwork. A must-have tool for professional woodworkers and hobbyists alike, this core box drill set delivers high performance and reliability. Colour:As Shown Material:Iron Package Contents: 4 * Slotting tool 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.