The double-column lift is a special mechanical lifting device commonly used in automobile repair and maintenance units. The double-column lift is the main type of lift, and is widely used in the repair and maintenance of small cars such as cars. The two-column lift has two types, symmetrical and asymmetrical.
The arms of the four arms of the symmetrical lift are roughly equal, so that the center of the car (or the center of mass) is in the middle of the column. This type of symmetrical lift is used for the daily maintenance of cars such as pickups and vans. Probably the best choice.
However, for some symmetrical double-column lifts with insufficient width between columns, it is a big disadvantage to not open the door after the car is lifted.