Rounded aluminum profile suitable for protecting the external corners of the claddings, due to their perimetral closure, as a connecting profile between riser and tread in ceramic or natural stone finished stairs and as an end profile on the floor. Its particular section and the availability in two different finishes and special pieces such as internal and external capsules, joints and closing caps, make the profile in polished and satin aluminum, a very refined profile that allows a perfect installation even in environments subject to high mechanical stress.