mmmm silverline.
had so much of their shite fail ive stopped shopping at toolstation – even when a brand is mentioned that isnt silverline – it invariably ends up being silverline.
the blue box of broken knuckles.
draper one looks good though , at least draper have a touch of quality control it seems.
we also repurpose these at work for stubborns – they are supposed to be for spinning pipe up.
in my personal tool box i have the above – it works fine , fit it then the camming action of pushing away from the side the chain comes through tightens the chain and gives you the grip you need.