This Doyle is a copy of the wilton and an exact replica of the other 2 chinesium vises Knurlednut posted above, just the name plate is changed. Just looking at it it looks like it will snap in half if you cranked on it hard. Perhaps they just know enough homeowners with built on garages who will never really use them will buy them and they can just keep replacing the few broken ones that real users break and they'll still make money.
Just compare it to a photo of any old vise in the vise thread and look at the difference in one that was designed by people who knew what a vise should be capable of, not by preppy designers who have never been out of a computer room and are trying to capitalize on the novelty of it. They should call these types of vises "clamps" and restrict the word Vise for real vises.
Makes me glad I have real vises in my receiver hitches.