The derby half step is ideal for people with limited mobility; it halves the door step rise. The large platform allows the user to steady and adjust themselves before attempting the step. The plastic construction ensures that the step is tough yet will not rust it comes with a non-slip mat to ensure that the step can be used all year round despite the weather conditions. The steps four feet are adjustable this is to ensure that the step can be used at certain levels. Step length: 400mm (15 inch) Width: 740mm (29 inch) Height: 110mm (4 inch)