Aftermarket 11-3/4 to 12 x 5 ft Vent Hole Chisel B

- 11-3/4" to 12" x 5 ft Vent Hole Chisel Bit for Cable Tool - Large diameter x 5 ft. heavy duty length elevator shaft irrigation well ventilation hole - Presumably American manufactured with carbon and/or alloy steels, but unsure if this is Acme, Spang, Gill Rock Drill, Ideco, Trident, Rampp, O.W.S. Co., Keystone or maybe another historical tooling manufacturer. - If you require thread protector(s) on tool joint(s) add another $15. - Located in Mifflinburg, PA USA