Stepless Excellent doorstep ramps are used when negotiating doorsteps consider changing the word doorstep to threshold, because the term doorstep is typically used to describe stairs that lead up to or down from doors. They are used in places where there is an existing doorstep – placing the ramp in front of the doorstep compensates for height differences. The doorstep ramps are sold in kits suitable for heights up to 15 cm / 5.9 inches. This height capacity can manage a tall threshold or a shallow step. The 2 upper layers are loose for accurate adjustment in height. The ramp kit comes complete with accompanying instructions and accessories for attachment and individual adjustment.