Excellent link to JIS information Ash - thanks for that. But where do you get them?
My impact driver takes 8mm hex bits so I would want Vessel set 431801.
I have contacted them to ask about delivery to the UK but another forum suggested their charges were a bit on the steep side.
I found a set of Vessel JIS/ISO bits on eBay but they are 1/4" hex fitting.
So, any suggestions for alternative suppliers of Vessel stuff.
Alternatively any suggestions for an impact driver ('hit with hammer' type) that takes 1/4" bits.