Drillco 642A132B 6420A Center Cutting Imperial Regular Length Single End Ball Nose End Mill, 1/2 in Dia Cutter, 1-1/4 in Length of Cut, 4 Flutes, 1/2 in Dia Shank, 3-1/4 in OAL, Bright

Ball nose end mills have rounded end cutting edges. This style of end mill is available as a center cutting tool only. It is used where rounded details must be machined in a part (for example, a slot with a rounded bottom). It is also used where sharp machined corners must be avoided. Ball nose end mills are also widely used for delicate cuts on contoured surfaces of molds and dies.