13/16 End Mill, Carbide Tipped, 15° Right Hand Spiral, Right Hand Cut, USA Made, 57660. Compare price to solid carbide of the same diameter. Carbide is expensive and only used on the cutting edges. Steel body provides superior structure to absorb shock loads compared to solid carbide. Carbide cracks are stopped in the steel body pocket rather than shattering the entire tool. A shattered solid carbide tool often damages the piece being machined.