Drill Grinding Attachment

[Millcottage]

Hello,
I have lost the bottom part [the fine tuner] for my drill grinding attachment - a replacement doesn't seem to be available anywhere. Wondering if anyone has such a thing available? Thanks in advance.

 

[Alpha-Dave]

Is it just a metric bolt?

 

[Millcottage]

Thanks. No it is the bottom part of the contraption that slides up and down and has threaded nuts. There is a wee screw that keeps it on and of course allows it to fall off!!