Allgäu Holds - Sandstone Sloper M (Climbing Holds Set) 15 climbing holds from Allgäu Holds, made in Germany. Beautiful slopers for flat walls. The Sloper M is part of the sandstone series and is inspired by the appearance, grip, and manufacturing of climbing holds in the Elbe Sandstone Mountains, the Palatinate, and Bleau. The climbing holds come in colors white, blue, purple, dark green, and neon, but they are not UV-resistant. This means that outdoor use may lead to discoloration of the climbing holds. However, this does not affect the stability of the holds. Screws and nuts are not included and must be ordered separately.