It's a hand tool on a blowtube but I do make them for the lathe too

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It's for holding GL threads. So you have a threaded glass blank that you screw into one of these and then you rip off the prep and put it on a piece like a terp jar or a water bottle. It's just for...

I've been making GL thread holders for a few months now but this is my first set I've sold and finish together! This was a prototype case I've now added a lid that swivels to it! ...