My reason for buying another hay spike/pallet fork frame was that the first frame had Grade 5 bolts in the stabilizer bars. The first time I went to put on the pallet forks, the bolts broke off in the frame. The dilemma, taking a long time to drill out and retap the bolt holes, or change it back and forth as needed. After opting to change back and forth, I just ordered another frame. Then I took out the bolts in the stabilizing bars, put in grade 8, and left one set up for moving hay and another set up with pallet forks. These are great, heavy duty, well made products, and it still disappoints me that you all would use cheap bolts that broke off REALLY easily.