Hi,
I would think it would depend on how many you used - the idea is not to have enough give that the snake can get a brace to exert pressure against if possible.
One at each corner on a long tank might let it lift the lid far enough to get its nose in the gap - from there I would expect a big ball python to be able to lever the gap bigger till it either broke something or got itself jammed in the gap.
But evenly spaced close enough together around the lid and it wouldn't be able to get the initial force point - er... I think.
dr del