Fisher hardware is manufactured with a standardization of internal mechanisms. All chrome plating is triple plated -- copper, nickel, and chrome -- for durability. Every fixture we make is rigorously tested in both our modern in-house testing center, and in actual field situations under extreme conditions. Every detail is thoroughly checked and re-checked. And, before we make our products available to you, they must pass each and every test. So you get proven performance...Guaranteed!