Bottle jacks are hydraulic jacks that are mounted vertically beneath the load to be lifted. This is frequently a car or similar vehicle but doesn't have to be the case. This simple and straight forward design enables them to lift more weight to a higher elevations. They are comparatively small and light when compared to a floor jack for example, which means that they are perfect for emergency situations and even storage in a vehicle ready for any eventuality. They can fit into smaller and less accessible spots, enabling a lift where it will help the most.
Be sure to select the correct weight capability for the vehicle that you have in mind. - they are typically available in two ton, four ton, six ton and eight ton capacity. If there is any doubt at all, it is far better to go for a greater capacity than you need.

Bottle jacks must be used in combination with axel stands in order to give absolute security when working under a vehicle, no matter the brand that you buy. The simple hydraulic design makes for an effective jack. Always go over rather than under on the weight threshold.
Essential Combination: Use with Axel Stands
Bottle jacks are a cost effective solution to lifting a vehicle, with high leverage and the ability to squeeze into tight or difficult spots and easy to keep in a vehicle or domestic garage. However, most manufacturers as well as ParkerBrand. recommend them to be used in combination with appropriate axel stands. This is not some exercise in expanding sales, but very definitely a sensible course that is essential for your safety.