Aftermarket 21-1/2 Cable Tool Drill String Extensi

- 21-1/2" Cable Tool Drill String Extension Sub Adapter - Cable Tool Drill String Extension Sub Adapter - 3"x4' tool joint threads, - Around 21-1/2" Shoulder to Shoulder Length, - Outfitted with Wrench Squares, - For Well Drilling Rig Stem Bit - Located in Mifflinburg, PA USA