This set comes with 10 pieces of SHOP7D_10pieces 3.175mm 4mm 6mm 8mm Two Flutes Straight Slot End Milling Cutters, specifically designed to enhance your CNC machinery by providing precise, easy cutting capabilities. Made of high-quality Tungsten steel, these carbide endmills are perfect replacements for industrial cutting purposes, making them a safe and reliable choice for engraving and cutting fine materials such as Acrylic, PVC, Nylon, Resin, Wood, and Plywood. Please note that this product is not intended for use by individuals under 18 years old and is only recommended for industrial cutting purposes. Each package contains 10 pieces, with shank diameters ranging from 3.175mm to 10mm and total lengths between 50mm and 120mm, all neatly packaged in one convenient box.