Review on Car Door Step: Foldable Universal Fit Hook Stand Pedal for Car Roof Access - Portable Rooftop Step, Max Load 440 lbs by Brent Ayyagari

Very unstable design. The materials are great, but since the 'hook' part that goes through the doorknob is the only attachment point, any force applied other than downward creates a tipping motion. If the bottom material was rubber it might help stabilize it, but it's hard smooth plastic so it just slides over the door frame (scratching the paint and likely knocking you off the car...like mine) . ). i will send it back