Anyone got any info on a boat moving device?

[BURLEY]

Curt, you are welcome to come and check out my mover, even take it home to try it out. I like that it allows the hitch to still be hooked to the trailer without having to be removed or chalking the trailer on a slope. Has auto brake. It's mount has a one bolt hinged connector for easy on and off. Just thought I would offer.     I attached a pigtail off my trolling battery for my 12 volt supply.