Hardware Resources’ 500 Series Dura-Close Synchronized Soft-close Undermount Slides combined the latest soft-close synchronized technology with relaxed easy-to-open pull force and best-in-class attachment clips to create the ultimate undermount slide product, the company says. The slides come with a state-of-the-art rack and pinion system built into the slide that keeps slides aligned, eliminating common side-to-side racking – in nearly all drawer widths.