My brother has asked for our assistance with identifying what this kit is/was used for. In researching the company, it appears they are still in business in Fresno and product lines includes mostly things welding; Welding Cable Terminal Lugs, Disconnect Insulators, Welding Electrode Holders, Buship Type Lighting Strings, etc.
My experience with purchasing burners (stoves, heaters, etc.) that are capable of multiple jets .... suggests to me this is a kit of some sorts of fuel jets, but that is a guess on my part. So if I draw a line between welding and thinking it's a jet of some sort I find myself thinking along the lines of a cutting torch or welding torch, but again that's taking an educated guess and 25 jets is an awful lot of variety for any jet kit in my thinking.
Any insight or assistance (gives Rusty a gentle pat on the shoulder) would very much be appreciated.