Kinki Amibari Cable Connectors
These small double-ended screws allow you to connect two cables to make a long one. I use these constantly for trying on in-the-round sweaters. When I'm ready to have a try-on, I unscrew one needle, screw this in and add a longer cable, and pop it over my shoulders to check out the fit.
The screw join on Kinki Amibari cable connectors come in 3 sizes, M1.8, M2 & M4. Be sure to select the size that matches your cables.