This 8-flute end mill has revolutionized the way I work with metal. The 4mm depth and 25mm cutting diameter have made it an ideal choice for precise milling. Its high-speed steel material not only ensures durability but also provides efficient performance. The T slot design has allowed me to easily clamp down the workpiece, offering additional stability and accuracy during the milling process. The multi-fluted design also reduces chip load, resulting in cleaner cuts and an overall smoother output. One thing to note is that the shank may not fit all milling machines. However, with its impressive performance and precision, the HSS T Slot End Mill is definitely a worthy investment for any machining project.