The spiral jack is a mechanical jack, which can be used horizontally. To reach the lifting or decline by pulling the stub. Adjust the tooth support method on the joystick: first rotate the joystick directly in the direction of clockwise, so that the lifting sleeve rises quickly. Insert the handle into the crack hole, move up and down the handle up and down, and the heavy objects will rise. When a red cordon appears on the lift sleeve, the handle should be stopped immediately. If you need to decrease to the opposite direction, the heavy objects will begin to decline.