I have been using them in both CCMT & DCMT formats for a few years now & so far pleased. I've posted a few pics in the past. I did the 303 stainless parts with them on my radial, including valves. Then I did some back to back tests on 4140, 1144-SP & also some sh*t grade 1018 which always looks a bit stringy regardless of cutter. For whatever reason, geometry, coating or combination, the SS inserts did a better job. Both AliExpress & Ebay sourced, I'd have to check.
