Features: 1. These milling cutters are made of tungsten steel with good milling, cutting performance, ensuring high work efficiency. 2. They have sufficient anti-bending strength, wear resistance, high hardness, high wear resistance and high strength. 3. Sharp cutting edges, can be used for milling holes, grooves and edges on plates and the process will be smooth. 4. Well polished surface is quite clean, neat, and there is no glitches or burrs on the shank. 5. Many items or materials can be engraved, such as circuit boards, hardware parts, plastics, copper and stainless steel. Specifications: Material: Tungsten steel Type: Ball nose cutter Weight: Approx. 136g Cutting Edge Radius 0.5mm 1mm 1.5mm 2mm 2.5mm 3mm 4mm Cutting Edge Diameter 1mm 2mm 3mm 4mm 5mm 6mm 8mm Shank Diameter 4mm 4mm 4mm 4mm 6mm 6mm 8mm Overall Length 50mm 50mm 50mm 50mm 50mm 50mm 60mm Package Includes: 7 x Milling Cutter Note: Please allow 1-2mm error due to manual measurement. Thanks for your understanding. 1、These milling cutters are made of tungsten steel with good milling, cutting performance, ensuring high work efficiency 2、They have sufficient anti-bending strength, wear resistance, high hardness, high wear resistance and high strength 3、Sharp cutting edges, can be used for milling holes, grooves and edges on plates and the process will be smooth 4、Well polished surface is quite clean, neat, and there is no glitches or burrs on the shank 5、Many items or materials can be engraved, such as circuit boards, hardware parts, plastics, copper and stainless steel