A handy gadget!!

I bought this at the Knitting Show last week for a £1+.
 
Just what I needed as most of my knitting needles are the old imperial sizes and, as we have moved out of the dark ages, patterns are metric. And to add to the confusion the US patterns are different again!! The gadget has US sizes on the back, which is a bonus!!
 
All of my double pointed needles don’t have sizes marked on them. Being a “canny” soul, I didn’t want to buy new sets of needles.
 

A wet, wet day here :0(