AR Warner is on my list because it appears they are the only ones with HSS indexable inserts. I do/have done a lot of aluminum on my atlas 618. Though, once I try a CCGT insert, I may not care about HSS for aluminum and the softer metals.AR Warner toolholders are good quality, but I don't think they are any different then any other name brand. They do offer things that are not available elsewhere, the threading toolholder I have has one side external threading and the other side internal, so that helps save the cost on an additional tool.