Quality Tusq material, it's rock solid but sands down into shape very easily. The point that contacts the strings is arched all the way across, so this saddle can be sanded and shaped to match the curvature of the neck. Therefore, whether the low strings or high strings need to be raised or dropped, you can achieve that effect with sanding the bottom at a proper angle. This saddle is slightly oversized to give you plenty of cutting room. It isn't slotted, however, if you play on it for a few hours, it'll break itself in and the string will rest in the most natural position.