Stair Edge Trims Made by Quantum Profiles RWSQUTA these are the pre mitred one piece angle that fit on the edge of open stairways mainly in commercial properties. They dress the edge of the step providing a uniformed finished appearance. Supplied in aluminium or welded PVCu these angles are at 90 or 83 degrees to suit the stairway in question. Easy to fit using the positioning tabs and tubed adhesive such as Pink grip or Fast grip, they finish a stairway in a professional manor hiding the nosing edge, carpet or flooring.