In the farming world at least here in Maine, the drawbar is the 2' long or so rectangle shaped bar that is placed in brackets under the rear pto housing and it is used to tow (trailers, manure spreaders, semi-mount implements and such). The Bar that you guys are referring to with all the holes in it is called a Tool Bar. It is used to attach small farming tools such as a Scarifier, a few spring tooth harrows, other odd farming tools most farmers don't use anymore. It also can be used for what you folks are talking about as long as you're only towing a light trailer, but around here it's used mostly just to keep the lower draft arms apart/in-place in relation too one another and from swinging out and hitting the tires.