General description The Faithfull Prestige Tri-Scale Engineer Rule is a durable, precision measuring tool designed for engineering and drawing applications. It features six color-coded scales for easy recognition and conversion of ratios, making it ideal for precise measurements and ratio conversions in various projects. The unique triangular profile keeps fingers away from blades during cutting or scoring tasks, ensuring safety and accuracy. Technical specifications Length: 300mm (12 inches) Scales: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125 Material: Aluminium with black anodised finish Scale engraving: Laser-engraved for precision Compatibility and accessories Compatible with standard cutting and scoring tools Designed for use in engineering, architecture, and DIY projects Installation No installation required; ready to use out of the box. Usage Use the scales for converting ratios in technical drawings Utilise the triangular profile to keep fingers away from blades during cutting or