I'm interested in hearing from folks who have used them. I went down the Koken rabbit-hole a bit, and found out they're the inventor of the concept (an extension that can give 15° of wobble, but has a second position to work as a regular/fixed extension too). These days Snap On and Capri make them too.
Experiences with those three? Anyone else make 'em?
Experiences with those three? Anyone else make 'em?
