The metal chime bars are made of TreeWorks' exclusive Aluminum/Titanium alloy, comprised of 11 different metals melted together. They are heat treated for 8 hours to create a crystal clear tone, then the bars are polished to a brilliant finish. The unique chromatic-like tuning has been described as ethereal and shimmering. It blends beautifully in all musical settings. This distinctive sound is what made TreeWorks Chimes famous. The mantle, TreeWorks' name for the wooden frame, is crafted from solid Tennessee hardwood. The deep color is brought out with a hand-rubbed oil finish that is high-end, yet understated. Each chime bar is individually hand-tied to the mantle. The braided CordLoc can hold up to 50-pounds (think miniature rappelling rope). To say TreeWorks' chimes are durable is an understatement.