[Arya Ebrahimi]

I inherited some tools from my Uncle and there were 3 of these in his toolbox. I have no idea what they're for. They're basically little clamps, but not sure for what

For reference, they're about the size of a 50 cent piece.

 

[KILLER"B"3]

old rubber line clamps, brake lines, vac. lines, heater hoses, fuel lines etc.

 

[BumpyDodge]

Generically referred to as "Hoffman clamps". Relatively common item in a chemistry lab.

 

[MilCrawl]

looks like tube clamps to me.

 

[smewhtguy]

old rubber line clamps, brake lines, vac. lines, heater hoses, fuel lines etc.

This.