... and etc polishing bright appearance Features: black zinc alloy round shape handles A.Product specifications1.Handle sizes:Length:90MM-400MM, ... Height:48mm-60mm2.Nut Sizes:M6, M8.3.Handle Material:Plastics, bakelite, zinc-alloy steel, polyamide, ... : ISO standard, 100% Whole range inspection through the production.3. Inspection equipment: Hardness test, torque test, salt spary endurance ...