Material: Solid Tungsten carbide. Durable and sturdy and wear resistant. Downcut Bits Dimension: 1/8" Shank (3.175mm). Cutting edge diameter, 1/8" (3.175mm). Cutting edge length/flute length, 17mm. Overall length, 45mm 5pcs Downcut Double Flute Spiral CNC Bit: Ideal For carving/cutting/engraving/milling/slotting/sculpturing in materials like MDF, ABS, PVC, acrylic, nylon, resin, plastics, density board, wood, plywood, hardwood etc. Widely used For CNC Engraving, Milling, Roughing, Hollowing, 3D sculpturing purposes Clean Cut & Excellent Edge-Grinding: The design of flutes, larger spiral chip space of CNC Router Bit makes non-stick crumbs, smokeless, odorless and silent during processing, smooth cutting and fast chip-removal High Quality: Industrial quality control to ensure best performance. Suitable for most CNC engraving machine