Rolson Aluminium Site Square: rafter, angle and cut, can be used saw guide 50855. Produced from solid aluminium it has permanent graduations and numbers etched into the surface. It is Lightweight with a large edge guide and thick enough that it can be used as power saw guide. There are various common cuts such as hip and top cut pre etched as well as angles from 10 to 90 degrees. Features: - PRESET CUTS: pre-set angle guides for various common building cuts - ANGLES: easy to measure and set a variety of angles - THICK UPSTAND: great for carcassing sheet materials and joinery - LIGHTWEIGHT: strong light and rust resistant ideal for tough environments but equally useful in a workshop - IMPERIAL: this model has imperial dimensions on one edge - SAW GUIDE: with care can be used with power tools as a saw guide - STANDARD EDGES: both 45 and 90Deg angles standard Rolson offers a wide range of tools that are suitable from everyday use by the DIY enthusiast to on-the-job professionals. Solid aluminium body, permanent graduations and numbers. Thick Edge can be used as saw angle.