5" diameter x 3 ft. Chisel Drill Bit for Cable Tool
Used
Heavy duty cable tool chisel drill bit
For water well drilling rig,
Appears to have 2-1/4" x 3-1/4" pin.
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.