When looking to enhance our flat vertical wall, we chose the large Golfus volumes to fill in some sparse areas of the wall with no t-nuts. They have very interesting shapes and the texture is grippy but also sort of soft at the same time; the texture is finer or smoother than that of the bolt on volumes we got at the same time. The little divots or hollows in them are very interesting and fun to grip. We currently have some of the double incut medium jugs installed on the volume, and they are a great fit. Larger holds would fit as well. We put this one mid way up on our wall near the other Golfus volume (40 and 45 degrees) and love them close together.