Pallet Jack for inside enclosed trailer or box truck

I have a few and the narrow ones are terrible for heavy pallets. I have a 1950's one with wide feet and it is the best one we have. Spin on the front wheels. Depending where you are get one on an industrial auction. I bought all but one of mine like that. most expensive one was 50.00 I have never had to work on any of them. Ran over one with the loader and had to toss it in the shearing tub but that was no fault of the jack.

I can fit 6 48x42 pallets in a standard box truck with a normal harbor freight pallet jack.