The Stanley Heavy Duty Combination Square is a precision measuring tool designed for professional tradespeople requiring accurate marking and layout work. Built with a robust cast iron stock, this combination square offers enhanced durability for demanding workshop and site conditions, making it ideal for carpenters, joiners and metal workers who need reliable measurement tools they can depend on day after day. The steel rule features class 1 accuracy and is machined on all faces for precise readings. Graduations are clearly marked on both sides of the blade in metric millimetres as well as 8ths and 16ths of an inch, providing versatile measurement options for different applications. The integrated level and scriber add practical functionality, allowing you to check horizontal alignment and mark materials directly without reaching for additional tools. This versatile square functions as both a try square and mitre square, offering multiple measurement and marking capabilities in a sing