Anti-slip, high traction surface. Easy to install and aligns against the door. Adjustable to fit a range of threshold rises and accommodates wheelchairs, scooters, walkers, canes and many other accessible products. Free standing, lightweight and durable. Designed for many different types of doorways and can be used indoors or outdoors. Works best for a 1/2″-1″ threshold. Weight capacity 600 lb.