Mortars and something similar found on my property

[Zamboni250]

I found these mortars on my property over the course of several years.
Recently I found a similar man made looking object seen here. 

The hole goes all the way through and obviously this artifact is broken in half. Any ideas on what this could be?

[Ron Kelley]

You posted the same artifacts three times so I deleted the other two for you.

[Zamboni250]

Thanks,
Sorry for the multiple posts....Just starting out here
Any Ideas about what I have found?

[Hoss]

Hi Zamboni it always helps us to know where they were found We do not ask for an address but at minimum a county and State or Province

[Zamboni250]

These were found on my property in Media PA just off of Leni road....I assume they are Lenni Lenape Indian?

[Hoss]

Do you find many arrowheads on the property? Or just these mortars? The third picture may just be another mortar that broke in half

[Zamboni250]

Thanks for your responses Hoss....Much appreciated.
Never found any arrow heads. Just the mortars. The last seem different because the hole seems to go all the way through (widened on both sides) as if something was strung through or perhaps even poured thru.

[Ron Kelley]

Hey Zamboni250,  :welcome: From Michigan U.P.
Many times mortars were worn through from use. They were probably discarded at that point.

[gregszybala]

Ron may be on it but hard to tell from the pics. May have been used from both sides?
And Welcome!