Putnam Non-Center Cutting Square End Mill, Fractional Size: 3/8 IN, Decimal Equivalent: 0.3750 IN, Overall Length: 2-1/2 IN, Cut Length: 3/4 IN, Shank Diameter: 3/8 IN, Straight With Weldon Flats Shank, Number Of Flutes: 4, List Style: 260, M42 Cobalt, Bright Finish, Hand Of Spiral Cut: RHS/RHC, Metric Size: 9.53 MM, For Free-Mach Stainless, Alloy Steel, Med Carbon Steel, Low Carbon Steel