The Faithfull Prestige Tri-Scale Architect Rule is 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 The black anodised finish offers enhanced corrosion protection and the laser engraved scales give outstanding measurement accuracy Scales: 1:5, 1:10, 1:50, 1:100, 1:200, 1:500