So I read this article about chirality and helicity and it says "For massless particles, chirality is the same as helicity". But as far as I know, helicity takes form in numbers (-1/2, +1/2) while chirality takes form in left or right (left chiral, right chiral). So how do these two different properties become the same?

Source:https://en.wikipedia.org/wiki/Chirality_(physics)#:~:text=A%20chiral%20phenomenon%20is%20one,is%20the%20same%20as%20chirality.

I read this article about chirality and helicity. At some point it says

For massless particles, chirality is the same as helicity.

But as far as I know, helicity takes form in numbers, $(-1/2, +1/2)$, while chirality takes form in left or right (left chiral, right chiral). So how do these two different properties become the same?