Jason Jones Pick is for the 8mm (5/16) but they come in a few different sizes, the pick was more of a project on machining than pick making lol
Huw Eastwood Very nice, always had a soft spot for those. Encountered and owned dozens of the royal patent over the years but only ever saw a single ACME example with the v shape ‘signpost’ bits, that I fabricated blanks and made keys for must be 30 years ago.