A fly cutter is a versatile cutting tool used in machining processes to achieve flat surfaces on workpieces. It consists of a single-point cutting tool mounted on a spindle that rotates parallel to the workpiece surface. Unlike traditional milling cutters that utilize multiple teeth, fly cutters feature a single cutting edge, typically made of high-speed steel or carbide. The simplicity of its design allows for easy setup and operation, making it a popular choice for both amateur and professional machinists. Fly cutters are commonly used in milling machines and machining centers to produce smooth and accurate finishes on various materials, including metals, plastics, and wood. They are especially useful for facing large workpieces or creating flat surfaces with wide cuts, thanks to their wide cutting diameter.