The Stanley 64R Engineers Steel Rustless Rule in 12″ / 300mm size is the professional’s choice for longer measurements and general engineering work. This extended length makes it perfect for larger components, layout work, and applications requiring greater reach whilst maintaining exceptional accuracy. Constructed from rigid rustless steel, this rule features metric and imperial graduations on two sides across four edges. The imperial side provides comprehensive graduations to 16ths, 32nds, 64ths, 10ths, 20ths, 50ths, and 100ths, whilst the metric side is graduated to precise 0.5mm increments. As a Class 1 rule, it delivers professional-grade accuracy for all your measuring tasks. With a width of 25mm and increased thickness of 1mm, this 300mm variant offers enhanced rigidity for accurate measurements across longer distances, making it a robust and reliable tool for demanding workshop applications. Features and Benefits: • Extended 12″ / 300mm length for versatile measuring applications • Rustless steel construction for workshop durability • Dual-sided graduations with four measuring edges • Class 1 rule certification for professional accuracy • 25mm width and 1mm thickness provides superior rigidity Specifications: Length (mm): 300 Length (in): 12 Metric/Imperial: Metric & Imperial