These spiral up-cut router bits with 1/4 inch shank are great for softwood, hardwood, and aluminum. They are ideal for milling, grooving, pocketing, and cutting various materials. These bits are designed with a 4 inch total length and a 1/4 inch cutting diameter with an up-cut spiral design that provides fast chip removal and excellent cutting performance. The long spiral flute design also enhances chip evacuation, reducing clogging and improving cutting efficiency. These bits are made from high-quality CNC machine tools with precise specifications, ensuring high accuracy and long-lasting performance. The sharp cutting edges and precise size ensure smooth cuts and accurate profiles.