It didn't work for us initially because we only used the pin and wedges on the edges of the rock for fear they might get stuck. Once we went right down the middle, it separated perfectly. THERE IS A LEARNING CURVE FOR THIS TOOL. Make sure you use the same amount of force each time you hit the pin and wedge with the hammer. Hit him once or twice and move on to the next wedge. Also arrived a day earlier than expected. I want to upload photos but can't?