Thanks Derek, much appreciated. They are much bigger than the ones on the plate I have so obviously not a standard between sizes, think mine are only 18mm Dia
Tool plate is not really going to work for me I dont think as its only a VDI20 which is a bit small for my lathe. Looks like I will have to make up my own, not sure if VDI or some other method of repeatable holders is the way to go.
Hood