4-blade end mill $ 0.99 Ball diameter (mm): 1-12 Chamfer angle: 90 Minimum cutting diameter of center (mm) :1 Contour radius (mm): 1-12 Cutting diameter (mm): 1-12 Maximum cutting depth: 50 Number of effective cutting edges: 4 Function length (mm): 3-36 Helix angle: 35 Material: Tungsten steel Number of slots: 4