They look quite substantial.LOL.
Looks to be excellent protection from Covid. Where can I buy one? l deffo wouldn't look strange walking around my town (and no i don't live in Chester) lol
I've not got any welding gear...
This is the closest I could get to having some leverage, it'd probably be useful;
I didn't use the bolt with a spanner to increase any force as they worked fine without and putting extra force on may knacker a reasonable set of grips anyway.