The stair treads are optically tadelos. But the workmanship is not good, especially for the price I expected a lot more. We bought the Stufenmatten for a memory staircase that is really committed only rarely. Nevertheless, some detachments in the border are already visible. The dimensional stability is poor. It can be seen at each stage that the mats only to the adhesive dots has contact with the step, otherwise edges and edges waves up or stand from considerably. For the price I would not buy this Stufenmatten again. They seem like cheap discounter goods.