Hi-lift jacks are death traps at best. I've seen too many handles snap back up and vehicles fall off of them.[/QUOTE]
I will highly agree that Hi-Lift and similar farm jacks can be dangerous, mainly when used by people who are not familiar with them or taught proper use and safety, and maintenence/ lubrication. handles do fly back and injure people, and many have crushed fingers between the handle and jack, but most were a result of operator error. if you dont fully engage the jack mechanism at the end of the handle stroke, it will reverse the built-up energy and swing back. you must have a good grip and control of the handle, and if you dont have the strength or energy to fully engage it without struggle, its time to take a break or get someone to take over. and you must be very careful and thoughtful when deciding on the location of the jack on the vehicle, and the ground it is sitting on, especially if on an incline or very rough terrain. but most of it breaks down to learning proper use, having common sense, and paying attention to the task at hand. that said, it can be a lifesaver when needed. they are a multi-tool. a jack, come-a-long, use it to spread things apart(i.e. tires and fenders, etc.). i have had one in every 4x4 ive ever had. its like a gun, youd rather have it and not need it, than need it and not have it... if you look in my pics, i think there may be some pics that show the front of my M1010, where there are 2 Hi-Lifts strapped to the front grill guard, with a strong cable lock securing them from sticky fingers. its like dual .45s... just in case...