When scissor jacks appear, they are mostly related to tire changing operations, and this type of jack has a simple structure, occupies small space, and is low in cost. It is often used by car manufacturers as an accompanying tool for car buyers.

The shape of a scissor jack is similar to a diamond shaped structure, and its principle relies on human remote control. The angle between the isosceles triangle on both sides of the jack and the ground will increase or decrease, and the two supporting rods above will also rise or fall accordingly, thus achieving the purpose of lifting and lowering the car.

Since the length of the support rod of the scissor jack is equal and the area of the upper and lower support surfaces is almost the same, does it mean that this type of jack can be used in both directions? The answer is obviously not possible, because the placement of the jack is related to the vehicle model, usually placed on the edge of the side chassis, and reverse use can easily damage the bottom of the car.

The correct use of a scissor jack is to have the narrower end of the jack support the edge of the chassis and the wider end serve as the base. Place the jack on the ground and use a T-shaped wrench to slowly lift it up, thereby supporting the vehicle.