The OX Pro Aluminium Rafters Square 180mm is a compact layout square built for accuracy and durability on site. Made from extra thick extruded aluminium with an anodised finish, it stands up to hard use while resisting rust and corrosion. The markings are laser etched rather than stamped, giving enhanced readability and offering double the precision of traditional stamped squares. Along the edges you will find metric measurements together with conversion tables tailored for rise and run applications, making it a genuinely useful reference for roofing and stair work. Handy notches allow scribing at 5mm intervals, so repeating layout lines is quick and consistent. The broad base design keeps the square stable against your material and doubles as a reliable saw guide when cutting. At 180mm it is small enough to carry in a tool pouch yet accurate enough for detailed set out. Whether you are marking rafters, laying out cuts or guiding a circular saw, this square delivers dependable results. Part of the OX Pro range of hand tools trusted by tradespeople for everyday precision.