Features: Versatile CNC End Mill Set - 5 sizes (5/32 inch-5/162 inch) of 4 flutes designed carbide end mill set, works perfectly on milling, CNC or cutting machines, 2D/3D carving, spiral blade with sharp end, fast cutting and engraving. Clean and Fast Chip Removal - Spiral design, more space for fast and clean chip removal, high efficiency and stability, it will not stick the blade or create crumbs, achieving excellent processing of the top and bottom side finish when processing properly. Premium Quality - The end mill set made of high quality heat treated titanium tungsten carbide provides good toughness and strength, sharp and sturdy. Strong Compatibility - 1/4" or 5/16" straight shank solid power tool carbide bit fits most small rotary tools, wood drilling engraving, making DIY carving fans much easier to do woodworking Wide Application - Widely used for cutting, carving, chamfering, engraving, hollowing and so on, work as most American router bits. Apply to wood, steel, stainless steel, alloy steel, carbon steel, die steel, tool steel, cast iron, titanium, aluminum, etc. Specification: Material: Tungsten Carbide Steel Cut End: 4 Flutes Shank Diameter: 5/16in, 1/4in, 3/16in, 5/32in, 1/8in Cutting Edge Diameter: 5/16in, 1/4in Cutting Edge Length: 1/8in, 3/4in, 9/16in, 3/4in, 7/16in Overall Length: 2-5/8in, 2-1/2in, 2-3/8in, 2-1/2in, 2-3/8in Packing List: 5 * 4 Flute End Mill 5 * Plastic Case