✅ SOLVED Artillery shell?

[Kevo_DFX]

This is not my item, so I do not have weight or additional pictures I also have only approximate measurements.

My buddy was detecting a cabin foundation in PA and eyeballed this amidst the rubble. It is approximately 3.5 inches long, the narrow end is about 3/4 of an inch, and the widest part of the cone is 1.5 inches.

The clip on the end of the narrow piece spins freely.

 

[taz42o]

Thats a trencher tooth.
Or drill tooth They are the same.

Auger Teeth for Drilling

 

[Kevo_DFX]

Thanks taz42o!