The Prestige Tri-Scale Engineer and Architect Rules are commonly used to convert ratios with scales when making precision drawings. This model features 6 scales that can be easily recognised thanks to the colour coded inserts. The unique triangular profile keeps fingers away from knife blades when used for cutting or scoring card etc. Manufactured from aluminium using computer numerical controlled (CNC) machines. The black anodised finish offers enhanced corrosion protection and the laser engraved scales give outstanding measurement accuracy. Features: 6 laser engraved scales: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125 Triangular profile keeps fingers away from knife blades Triangular profile keeps fingers away from knife blades Made from aluminium using (CNC) machines Black anodised finish Specifications: Dimensions: H:40.0 x W:3.0 x D:5.0 cm Colour: Silver Guarantee:5 years Material: Aluminium Model Number: FAIRULETECNC