What is this tool for?

[luvtheheat]

Bought a few toolboxes today, packed with all sorts of stuff.

This has me baffled.

What's it for?

TIA

 

[mike93lx]

Opening a 5 gal bucket

 

[Pinaud]

5 gallon paint pail opener

 

[Milton Shaw]

Make sure you call the pieces between the tabs as the lid is almost impossible to remove without those tabs cut.