I thought is was for pushing below grade. At least that is what the manual eluded to!Kenny, not sure if you know it or not, the way JD has the blade set is the pin goes through all the holes to lock it for down force. The other set of holes is where you put the pin through over the step in the mounting bracket. That allows the side plates to pivot and gives you a float feature. Some of the tractors this blade can fit on didn't have a float feature in the hydraulic controls.