Mckissick 20T Headache ball for a scale model crane in 1:50 scale.
Available in Smooth Fine Detail Plastic and in Polished Bronze Steel.
Plastic Looks perfect but it need some load ( weight )
Because the weight of the hook is relative low.
Watch out fragile model in plastic.
Polished Bronze Steel is much better but also more expensive.
Have not ordered it myself which I normally do before I put it in the shop.
I expect no problems , but you be the first to try.