10" cable tool drill chisel bit for well rig (oil gas water digging),
4" x 5" API thread connection, 47" length not including pin mesurement.
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.