I thought that it was a wave type, it was a segment type when I purchased it. The base seems to be strong, so it seems to be usable for creasing to concrete. However, we, processing of the block is the main, so it is easier to use the wear type as well. Although it seems that it segments it as a segment type if I see the image of the web well, I misunderstood and bought it. I do not use it much.