The exceptionally smooth yet hard coating improves surface quality, which, in turn, significantly reduces torque requirements. Intended for blind hole and through hole threads and thread depths up to 3.5 x DN in steel, it has also shown good results in machining cast iron and aluminum. The TC470 Supreme is offered in four variants: With or without lubrication grooves and/or internal coolant, as well as with radial or axial coolant outlet, optimized for long and short threads.