aluminiun is not HD right?most sellers don't have scale.is ring toward top after knurling?all look same to me in pic.only one different to me is 10 because of color, and 8 doesn't have 2 rings on knob at bottom. 7 and 8 are the only HD in pic according to that site.if i saw listing for 8 and 10,how would i know it is not HD?all handles look same thickness on that pic.thank you very much.
