Alumicolor Drafting Fan alumicolor-drafting-fan/

Description The Alumicolor Drafting Fan is a convenient allinone tool featuring standard architectural engineering and metric scales Eight blades of aluminum sheet are riveted together creating a compact and versatile measuring tool One of the blades includes a regular ruler and a center finding ruler The other blades feature the following calibrations: Architectural 132 116 332 18 316 14 38 12 34 1 112 3 Engineering 10 20 30 40 50 60 Metric 1:1 1:2 1:5 1:10 1:20 1:50