How much load can these plastic cabinet things hold

cabinets

I just moved into my first house and I'm wondering how much load these plastic things (shown in picture) can hold. Each cabinet shelf is held up by four of these things.

Watching diy videos online, I'm convinced that the cabinets themselves can withstand a decent amount of hold. Wondering if these plastic things can, too.

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Best Answer

If they are like mine I would say over 100 lbs the pin is very strong, I have found the particle board to crumble or shelf break before the pin gave way , the ones that hold in place with the clips are great as they cannot fall out. There should be 4 pins 2 in each side.

Is that shelf in backwards? Mine the front of the shelf has a piece of laminate over the particle board.