I have a couple that look at least very similar. Are they very thin in profile? Mine are and they work GREAT for use on various collets. Die grinders and wood routers beg for them, given the **** wrenches that come with them. I got mine at a pawn shop so I have no clue as to normal origin, but I was sure glad they were sized properly for my needs!![]()
From alloy artifacts.
"As chrome alloy tools became more in demand, Duro and Indestro started using the mark "Chromium Vanadium" to indicate these high-end (and more expensive) tools. Although many other manufacturers also made chrome alloy tools, these were usually marked using the abbreviated "Chrome Vanadium" phrase, so the use of the full element names can help identify particular Duro and Indestro pieces."
https://home.comcast.net/~alloy-artifacts/duro-indestro-p2.html
