Cutter blades for rotary tubing tools

In a rotary tubing tool of the type having radially expandable, opposed pairs of cutting blades, a pair of cutting blades wherein each blade comprises:

• a planar body member having an upper angle edge extending between first and remaining sides, an angular edge extending downwardly at approximately 45.degree. from the upper angle edge first side, an outer edge formed from said angular edge at an angle lying generally perpendicular to the upper angle edge and extending to a terminus, a corner block extending from the remaining side of the upper angle edge, and an acute angular edge extending from said terminus upward to join the corner block;
• a pivot hole disposed generally centrally through the planar body member;
• at least one cutter block secured to extend outward from a lower portion of the outer edge;
• and
• hardface cutting material secured on said cutter block to provide upward cutting capability.