Tightening the M&R Products tie-downs. These are attached with M&R'sD-rings at each corner of the trailer. This type of strap wraps aroundthe axle or A-frame to secure the car. Four straps should be used forsecurity. With only one strap on each end, a common practice, the carcan shift its weight on the trailer in an emergency maneuver. This givesrise to the phrase, "We have liftoff."