Suitable for 1/4 inch shank (6.35mm) hand drills, holder motor drive drills. Cutting diameter: 8mm, 9.5mm, 12.7mm. This product is made from hard alloy with sharp edge, high hardness, precise positioning, smooth cutting, and impact resistance. Suitable for milling grooves on frames, panels, clocks, pylons, and other wall-mounted tools to create keyhole hangers or cable routing channels. The hard alloy blade features high-quality welding for stable performance and high output, minimizing the risk of breakage or deviation during use. The blade is sharp and durable, designed with an arc curve to facilitate efficient material removal and punching. Offers clean cutting, uniform rotation, twist resistance, and strength. Precisely ground shank ensures a stable hold in the clamp. Provides consistent rotation, good wear resistance, and extended service life. The milling body coating enhances chip evacuation and reduces friction. Ideal for professional woodworking applications on various materials including soft to medium hardwoods, medium-density fiberboard, plastic, and plywood. Instructions for use: 1. Prolonged operation may cause high material temperatures and smoke. Ensure proper cooling during use. 2. Replace the tool if dull to prevent breakage or potential injury. 3. Select a cutting tool larger than the workpiece for optimal results. 4. Always wear safety glasses during operation.