I've said for years that Hi-Lift/farm jacks are a product liability law suit looking for a place to happen. They are a VERY versatile tool....99% of them have been strapped to various vehicle for years, all types, styles, versions of protective covers...zero maintenance,,,I'd venture a guess that 50% of the vehicles that carry one have NO adequate jacking points to even make use of it. Of the remaining 50% that have adequate jacking points, 5% of the owners have ever practiced using such a jack in their driveway or other controlled environment, of that group, maybe 3% have used one in anger, (pulling numbers out of thin air, my best guesstimate over the years).
I quit carrying one because every time one is needed there are 10 people in the group that come running with their pristine jacks, begging some one to use it. Pour a coke over the working mechanism to get it freed up, a shot of lubricant and it's usually good to go. NEVER, EVER get your head between the jack and the handle. Ever seen the cartoon where a bumper/Hi-Lift/farm jack takes off...it happens.
Jack handle make a great sleeve for a bent tie rod/drag link on a Jeep CJ/YJ in a pinch.