8PCS 4-Flute End Mill Bits Carbide Tungsten Steel Milling Cutter Router Bits Rotary Bits Tool Straight Shank 4-12mm Double Edged Cutting Engraving Bits Independent Case Store Features:Versatile CNC End Mill Set -- 8 sizes(4-12mm) of 4 flutes designed carbide end mill set, work perfect on milling, CNC or cutting machines, 2D/3D carving, spiral blade with sharp end, fast cutting and engraving.Clean & Fast Chip Removal -- Spiral design, more space for fast and clean chip removal, High efficiency and stabality, it will not stick blade or create crumbs, allowing excellent processing the high-side and bottom finish when processing in a proper way.Premium Quality -- High quality heat-treated titanium tungsten carbide construct milling cutter set provide good toughness and resistance, sharp and sturdy.Strong Compatibility -- Straight shank solid power tool carbide router bit fit most small rotary tools, woodworking drilling carving engraving, making DIY carving fans much easier to do the wood working job.Wide Application -- Widely used for cut, carve, chamfer, engroove, hollow and so no, function like most US router bits. Apply to wood, steel, stainless steel, alloy steel, carbon steel, die steel, tool steel, cast iron, titanium, aluminum, etc.Specification:Material: Titanium Tungsten Carbide SteelCut End: 4-FluteShank Diameter: 1/8in (4mm), 1/4in(6mm), 5/16in(8mm), 3/8(10mm), 1/2in(12mm)Cutting Edge Dia: 1/16in(2mm), 1/8in (3mm), 1/8in (4mm),3/16in (5mm), 1/16in (2mm), 5/16in(8mm), 3/8(10mm), 1/2in(12mm)Cutting Edge Length: 6mm, 8mm, 11mm, 13mm, 15mm, 22mm, 26mm, 30mmOverall Length: 50mm, 60mm, 75mmPacking List:8 * 4 Flute Milling Cutter8 * Plastic Case