For drilling 22" Elevator Shafts, Irrigation Wells, and other Large Diameter Boreholes.
Appears to have 4" x 5' pin threads.
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.