The OX-P506518 180mm Pro Aluminium Rafters Square Metric is ideal for tradespeople looking to work with precision. Although with its easy-to-read laser-etched marking, that provide twice the accuracy of stamped squares, DIY enthusiasts will also benefit. This product benefits from metric markings and conversion tables for rise and run application and an extra-thick extruded aluminium body, anodised aluminium construction. For precision and durability, The OX-P506518 180mm Pro Aluminium Rafters Square Metric offers a lot to professionals and amateurs alike.