Features: for durability1/8" carbide end mill kit with tool holders for aluminum grindersFor use with handheld electric or pneumatic tool controls for grinders, tools or drill bits, this mates with 1/8" carbide shank drill bit. Suitable for cast iron, cast steel, carbon steel, alloy steel, stainless steel, plastics, metal and other materials. Different shapes include: cone, cylinder, flat cylinder. When working with these burrs, water is recommended as a lubricant. It can cut cast iron, staina, carbon steel, alloy steel, stainless steel, copper, aluminum, marble, jade, bone, etc. Widely used for engraving, shaping and removing sharp edges or corners, burrs and excess material. All burrs in this kit have a 1/8" (3mm) shank size, making them compatible with most grinders and rotary tools when shaping, grinding and finishing work with precision. Once the job or project is complete, you will be happy to place the burrs in a compact case so you can store, organize and transport this kit for future use. Sharp and strong, it can process all kinds of metals and non-metals. Product Parameters:Material: Tungsten CarbideType: Double Cut, Single Cut (Optional)Shank Diameter: 3mm Cutting Head Diameter: 6mm Speed: 1000 - 3700R/min Machining Hardness: ge; 85HRA Scales: For rotary files in pneumatics or power tool, the speed is generally 1000 - 3700R/min, and the tool must be clamped tightly. Package Included:10*Rotary Burr Note:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.