Kubota M59, Kubota L3800, Grasshopper 428D, Topkick dump truck, 3500 dump truck, 10 ton trailer, more lighter trailers.
It looks like it’s supposed to clamp around something and use the shorter bolt to press it through the hole in the back plate. I have no clue what you would actually use it for.
Ford 3910, John Deere 420C, Kubota G32XKS, IH 2606, Bad Boy Maverick-60"
It's a puller. It could be used for what ever it fits. A gear, sprocket, bearing or pulley. I have about eight pullers of various configurations and sizes. You can never have too many.