The Ox Pro Tuff Rule is one of the most versatile and flexible in more ways than one rules youll come across. The rule is a rigid, versatile, and compact metric folding rule and quick angle finder with a practical purpose for everyday construction. Made from hard-wearing ABS plastic, the rule allows quick measuring of angles as well as lengths. The impressively added centre-line allows for measuring offset lines as well as splitting centres with the easy angle finder up to 180. 600mm in length, the Tuff Rule is the ideal for stud wall spacing along with floor joist spacing while the 45mm width is perfect for common framing timers.