The Doorline-Variwedge adjustable-height threshold ramp makes it easy to match the height of the threshold or step to within the thickness of a coin.Between the three sizes of Doorline-Variwedge, Small, Medium, and Large, you can match any threshold height from just 20mm (4/5ins) high right up to 100mm (4ins) high in 5mm (1/5ins) increments! It\'s fully adjustable in less than one minute, and is supplied with a spanner in the kit. This ramp can be freestanding (with rubber strip to grip and protect the floor) or can be fixed in place if preferred.