I'll see if I can find the name on it but it may be where I can't see it now. It was commercially built in Canada but would be very simple to build. If you look at the photo in my first post, you can see that it's just 2 pieces of channel about 3 ft long, spaced apart and welded to the vertical frame in front that holds the sprockets. A shaft from the pto runs through the channel and has a sprocket on the end, that drives the chain that runs up top to an idler sprocket, then across the top to another idler sprocket, then down around the back side of the front drive sprocket and then back to the main pto drive sprocket. This one was originally built to be mounted on the rear of the tractor but worked better for my application by mounting it in the front.