The TreeWorks double-row ZenTree Chimes move in tiered or stair-stepped groups of chimes instead of normal tuning with a gradual change in pitch from bar to bar. This tuning creates a soothing and mystic sweep with a nice tension and release when played from high to low. The bars are crafted from a TreeWorks chime-specific aluminum/titanium alloy. The chime bars are polished and heat tempered for brilliant tone. Each chime is individually hand tied with 50-pound braided CordLoc. No plastic ties are used. The ZenTree Chimes' mantle is hand-finished Tennessee black walnut.