SIZES: Suitable for 5/16" (8mm) shank hand drills and motor drive drill bits. Cutting diameters: 7.93mm, 9.52mm, 12.7mm. MATERIAL: Made from YG6X carbide for high hardness, sharp cutting edges, precise positioning, smooth cutting, and impact resistance. APPLICATION: These 1/4" shank router bits are ideal for solid wood, MDF, chipboard, and design profiles. Suitable for creating smooth, detailed cuts and crafting stylish furniture. Can be used for milling grooves on frames, panels, clocks, and other woodworking projects for keyhole hangers or cable routing. FEATURES: High-quality welded carbide blades ensure stable performance and high efficiency. Sharp and durable with an arc curve design for efficient chip removal and smooth operation. Includes T-slot cutting points for 5/16", 3/8", and 1/2" hex screws. Designed for milling T-slots compatible with metric hex screws or slotted nuts. Multiple sizes and designs to meet various cutting needs. TECHNICAL SPECIFICATIONS: Overall length: 46mm. Shank diameters: 12.7mm, 9.52mm, 7.93mm. Shaft diameter: 6.35mm / 8mm, compatible with most machines supporting 6.35mm or 8mm collets. YG6X carbide provides superior sharpness and durability compared to standard materials. DESIGN: Precision-ground shank ensures secure fit and stable operation. Smooth rotation, torsional resistance, and wear resistance for long service life. Coated milling bodies improve chip evacuation and reduce friction. USAGE INSTRUCTIONS: 1. Prolonged use may generate heat and smoke. Use coolant as needed during operation. 2. Replace the bit if dull to prevent breakage or accidents. 3. Select a blade size larger than the workpiece for optimal results. 4. Always wear safety glasses when operating. INSTALLATION: Insert the tool fully into the collet and tighten securely. Maintain proper clamping force during use. Partial insertion may damage the tool shank.