Rubber step mats are essentially a subset intersecting all other categories of rubber mats. Step mats include hollow mats, grill mats, pin mats, bubble mats or special designs made in handy sizes suitable for stairs and stepways. Hollow step mats are usually provided with beveled edges for the perfect look of the stairs. Pin or bubble step mats are sometimes provided with a right angular flap which covers the edges of the stairs as well.