If you follow OPST, Trevor Covich, or Ben Paul then you've seen this tool or a prototype of it in action intheir fly tying videos.You have called and emailed and asked about it. And now it's here: the OPST Shank Chuck Tool. It took a long time to dial this one in. The challenge was first, to make a tool that would fit with just about any vise on the planet, and they succeeded. The second challenge was finding a tool that can hold both shanks and some tubes- by unscrewing the chuck housing, you can flip the inner chuck one way for shanks and the other way for tubes.
The chuck will hold shanks down to OPST Micro Shanks, which are 0.90mm in diameter. Tube adaptor inner diameter: 2mm.