That's largely due to the fact that scissor jacks tend to have lower weight capacities and lifting ranges than bottle jacks ...

These are usually found in a car trunk as a tire changing tool due to its compact size. Scissor jacks provide by automobile manufacturers generally have a shoe to mate to a lifting point in the ...

A good floor jack is about the best upgrade any home mechanic can make. Photo credit: David Traver Adolphus / AutoGuid ...

Floor jacks and scissor jacks are designed to lift a car, not to keep it held up for a long period of time. They can and have failed, with unfortunate stories to go along with those events.