The Dark Matter Series is a dynamic and fun addition to the Shade Theory! They are cut from a standard, single sheet of plywood, with a CnC for precision, and are textured and color-matched to any hold color. Because they are relatively flat and cut exactly to their desired sizes, they have the unique ability to be stacked back-to-back, to create a "double thick" disc that can be further stacked and overlapped with other discs or holds. We very specifically placed all of the screw locations to match up when stacking back-to-back, so they will line up perfectly and to avoid adding new screw holes every time they are used. They can also be used individually, as stand-alone holds, and are very aesthetically pleasing. A great addition for any gym! These holds are screw-on only and made out of wood.