5/8" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/4" Shank Diameter, 3 Flutes, 2 3/4" OAL, (.625" Diameter), 52220, USA Made

For counterboring and spotfacing in applications where machine requires a smaller shank
1/64" Corner Radius, Tool Diameter Tolerance: +.001"/-0". Shank Diameter Tolerance: +0"/-.001"
Pilot Hole Diameter:1/8, If using a pilot this is the shank diameter of the pilot you should choose
Minimum Cut Diameter: .156" Because there is a pilot hole the tool will not cut below this diameter.
Set screw to hold a pilot or drill bit in place (if you are using a pilot or drill bit)

Hello,