I have a 6' standard duty Kodiak box blade. It stays on my L3710DT most of the time as a combination rear counterweight/bumper. I'm not sure exactly how heavy it is, but it is heavy enough that it doesn't scoot around easily to hook up to the three point. There seems to be a big difference between it and the 4' JBar box that fits my little Yanmar. the only problem I have had with it is that the cutting edge broke off one of the imported scarifiers. Apparently, the small spot welds weren't designed to chisel rocks with. Luckily, I went back over my tracks, found the pieces and welded them back together. Now it's better than before.