I got the Jack for my UTV and it works great. I can pick up the whole side of my Ranger to change a tire (s). The Jack is galvanized on the outside.
At one time i used a high lift jack; painful to use under water ugh.. The UTV jack works great for my boat lift; getting the wheels off in the spring and back on in the fall (I just pulled my lift week before last and used it again). The jack goes down to 6" off the bottom and lifts to 36".
Of course it gets wet inside and out; including where the worm gear is but the inside is filled with grease and after two seasons there is still grease in there and no rust. The worm gears are not galvanized (they are machined) so you'll want to make sure you dry it out. (I didn't do that and it's still not rusted).
Note: I am one of the owners of Hornet and we designed this Jack for off road UTV use and you will believe of course that my answer carries bias. If you buy it off our web site and it doesn't work for you ship it back for a full refund (within 30 days please). If it's wet I'll dry it out and use it for my personal use. It's the handiest Jack I own. Use it changing lawnmower blades, trailer tires, (including my very heavy wood trailer), boat trailer tires and you name it.