Threshold ramps are a quick, easy, and reliable way to make any doorway wheelchair accessible. Simply measure the height of the door entry and choose the correct size.  Installation is easy, and threshold ramps are great for doorways, sliding glass doors, and raised landings.  Made using high-strength aluminum (which will not rust or corrode) and features a non-skid driving surface. Threshold ramps support up to 600 lbs and feature a 3-year limited warranty.