While face mills are often associated with large diameter tools and multiple inserts, fly cutters offer an effective alternative for achieving superior surface finishes, particularly on low horsepower spindles. Traditionally regarded as manual machining tools, fly cutters have gained recognition among CNC machinists for their ability to produce very fine finishes. Compared to face milling, where multiple inserts are used, fly cutters utilize a single insert for cutting. This enables them to create a much finer finish due to the uniformity of the cutting surface. In face milling, the inability to individually adjust the height of the inserts can result in varying chip loads among different inserts, affecting the surface quality. Fly cutters, on the other hand, maintain a consistent and smoother surface due to their single cutting surface, although at a slower pace.