T-Slot Milling Cutter, Cutter Diameter: 1"", Face Width: 1/4"", Staggered, 8 Teeth, Long, Weldon Shank, Shank Diameter: 5/8"", 4-15/16"" Overall Length, Tolerance of Cutting Diameter: -0.002 to -0.007"", Tolerance of Cutting Width: -0 to 0.004"", High Speed Steel