TDI-N (D65.00-171.99) Double-Tube Drill System 4 Start Thread Connection Inner Tubes
TDI-N (D18.41-65.00) Double-Tube Drill System 4 Start Thread Connection Inner Tubes
TDO-I (D18.41-65.00) Double-Tube Drill System, 4 Start Thread Connection Outer Tubes
TDO-I (D65.00-171.99) Double-Tube Drill System, 4 Start Thread Connection Outer Tubes