well i built them because i wanted to have something heavier duty to lift things than the loader on our ford 3400,it has a set of forks on it but it wont lift too much weight realy,only about a ton or so,i had the forlift carraige already so i just added the brackets and it can definatly lift alot more than the loader on our other tractor,the tractor i use them on it my ford 8000 which is around 100 hp so it has a pretty heavy duty 3pt,unfourtanatly it wont lift high like the loader but they sure will lift alot,they are handy for moving around pallets of metal and parts as well as moving junk cars and stuff