1/2 X 1/2 X 1-1/4 X 3-1/4" 4 Flute M42 Cobalt Coarse Roughing End Mill ~ Cutting diameter is 1/2". ~ Shank diameter is 1/2". ~ Cutting length is 1-1/4". ~ Overall length is 3-1/4". ~ Ground from solid M42 blank. ~ 8% cobalt. ~ Center cutting. ~ Uncoated. ~ Their uniform cutting load per tooth assures minimum chatter deflection. ~ Fast stock removal. ~ Ideal for N/C machines.