John Rumm wrote:

Andy Burns wrote:

https://www.toolstation.com/p21894

While excellent for doing up the retaining nut, they are not much use
for the hot and cold flexi tails, which is what I get the impression the
OP is talking about.

My mixer had some rigid 'stalks' that screw into the block, then you can
use compression (flexi or not) onto those.