In order for the Shade Theory to work, we needed a foundational series of holds that included a wide array of angles, across a full range of sizes - this is that series! The Shade Wedges are a systematic series of holds (increasing in size from 2-21 inches in diameter, following the Fibonacci Sequence). Each set includes "wedge" shaped holds ranging from 20-90 degrees in increments of 5 degrees, offering a total of 85 holds! This series is critical to the Shade Theory, and in fact, all other series in this family will relate to the Shade Wedges. For the best experience possible, we suggested that any set of Shades be ordered with a corresponding set of the same size from one of the other series in this family. These holds are screw-on only.