UK stair nosing cutting, drilling and delivery service for all types of aluminium profiles. Mill Finish Aluminium - Other finishes available on request. We have a wide range of PVC insert colours to suit your needs! Our stair nosing products are specially designed for most commercial, industrial and domestic projects. Please have a look around our website and give us a call on (01274) 394904 for a free quote. The square stair nosing is fitted to steps that are at a 90º angle to the tread. The raked back stair nosing is fitted to steps that are at an 83º angle to the tread.