To explain this hold, envision a vertical wall, which is 90 degrees. The place where you can attach holds to this volume measure 40 and 45 degrees. It's math beyond that to understand what angle the landing area yields when on steeper terrains. The hold itself adds a nice variety as most of the hold has been designed to be a sloper.
This volume will accept holds that have a 4" footprint or less. That means most medium and large grips will fit. Of course, all small holds will fit comfortably.