This is a three pack of ball mills from Carbide 3D that are perfect for fabricating complex, organic surfaces. Each mill in this pack features a cutting diameter of 0.0312 inches, a shank diameter of 0.125 inches, and a cutting length of 0.0625 inches. These cutters really are great for precision 3D machining and fabrication. Each cutter is made of solid carbide to ensure long lasting use. Features & Specs * Cutting Diameter: 0.0312in * Cutting Length: 0.0625in * Shank Diameter: 0.125in https://elecena.pl/product/15181842/ball-cutter-0-0312-diameter-121-3-pack 2018-09-21 https://elecena.pl/product/15181842/ball-cutter-0-0312-diameter-121-3-pack 2019-12-05