Thanks, everyone. My trapping partner says we have one somewhere. After an extensive search, he found it. This model fits into a 3/8 inch drill. I believe Jim and Jay Gough , under the name Snare Masters, developed it. I’ll pick it up this weekend and see how many I can make.
Newt and Dale strongly recommend in-line swivels. I’ve found they work to a degree. It all depends on points of entanglement in the catch circle.