The way to distinguish the difference between end mills and drill bits is to observe the geometry of the drill bit and the shape of the flute to identify the difference. The drill bit is designed to drill directly and only drill up and down in the Z-axis direction; end mills can cut transversely into materials for grooving and profiling, and some types can even cut in all directions, so they can flexibly form surfaces, surfaces Milling, plunge milling, grooving, drilling and reaming operations.