All our handles are made from the very highest grade solid cast zinc and come with a 15 year guarantee on all mechanical parts and also a 3 year guarantee on our specially designed protective resin coating. We have worked closely alongside our manufacturing partners to create Titan Evo Protective Coating. The revolutionary new coating provides far superior resistance to scratches and chemical breakdown on all our handles. We chose to invest heavily in this technology so our customers can keep the finish they expect for many years.