Thinwall 18mm deepwell socket.
I used a craftsman. Not sure what's available on the other side of the pond though.
Curtis - Albany Oregon.
Currently receiving therapy from "Doc" - My 1985 VN700.
Daily rider in NorthWET Oregon.
Ammo Can Saddlebags
Shaved and Rejetted. Coastered. Degoated w/ Hardley pipes.
Bought Feb 2007 with 12K miles.
Hit the 24k mile July 2008