Detailed Specifications】Number of rotary cutters: 5pcs; Shank diameter: 6mm; Cutting diameter: 10mm. Premium quality】The milling cutter is made of hard alloy, stable performance, durable, safe and reliable. Practical design】Double cutter head, higher milling and grinding efficiency, easy to use, saving time and energy. Compatibility】The rotary shank is 6mm (1/4 inch), suitable for most pneumatic or electric rotary tools, such as drills and grinders. Powerful function】The tool set is used to work on various metal mold cavities, for grinding and carving wood, jade, marble and metal, for cleaning solder joints and burrs, etc. Package includes: 1 set of rotary grinding head. (Other products are not included) ATTENTION 1) Due to manual measurements, there may be a deviation of 1-3 cm. 2) The actual color may vary slightly from the photo due to different screen and lighting.