The Floding Door Step provides easy access to the roof of your vehicle. Simply hang the door step on the U-shaped door latch in each vehicle door. Loading and looping car bags and crates; canoes, kayaks and SUPs; skis and snowboards; and lighter ride. Use it even to wash the roof of your vehicle Safety hammer head At the front end of the door sill is a stainless steel safety hammer head, which can be used as a tool powerful to break windows in an emergency Height: up to 510 lbs - Door can hold up to 510 lbs - People dont need to worry about the driver - Surf , camping and kayaking Non-slip surface: door ladder measures 14.5cm (L x W x H) x 7.5cm (width) x 7.5cm (height) - Sufficient for most peoples feet . Non-slip mode provides a firm and secure hold allowing people to stand on steps Compatible with most SUV and RV models - Connt for most SUV U latches and RV. Please note the door lock type. There are some exceptions: For Acadia GMC 2011, for Chevy Tahoe, for 2012 Chevy Traverse, for Chevy Suburban, for Chevy Avalanche, for GMC Truck