Full Use Vice, FB Marketplace, Wolverhampton, £5

[Jonm]

there was a discussion about a “full use” vice as given below

I came across a little 6" vice for sale, stamped 'Ful-Use', British made. I'm just curious about the semi-circular cutouts on the jaw tops. What are those for, do we know?

One has just come up on marketplace, Wolverhampton £5

https://www.facebook.com/marketplace/item/653043136011084/