Two things not sure of. Maybe part of a door and the other thing no idea

[Kmatch7]

Square thing not sure might be part of door? Other thing I know served some purpose their is a thin part in the loop.

 

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[Rookster]

Maybe the tool with two rounds holes was a scales hanger of some sort. Those are two tough ones but good finds.

 

[paleomaxx]

The first one is the swivel loop from a horse harness. Similar to the middle piece on the top row of this old catalogue:

 

[Kmatch7]

Nice if so that’s pretty cool

 

[Bates]

The first one is the swivel loop from a horse harness. Similar to the middle piece on the top row of this old catalogue:

View attachment 1574177

Part of a whiffle tree

 

[ARC]

Part of a whiffle tree

AKA "whippletree".