I'm with Mex. This is the result of a 12T eBay crimper. I can go from #10 to below 4/0. Yes the sizes arent wire ga (I think its SAE), but I don't care. For the crimp below I pick die that the lug will fit in and not pinch and break it (ie- don't go too small to start), then go the next size down if needed, the crimper will tell you when it can do no more. I have seen very slight differences in lug size, and welding cable compresses differently than that used in feeder type service, so this method works fine for me. What HF DOES have is adheisive lined weather tight shrink tubing that covers all crimps
PS- Home Depot carries some smaller size end sealed lugs