Drill America polished end mill. Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems. Hex shanks have six flats on their sides to reduce slippage when working in high-torque applications. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging. 2 Flute double end stub.