Helix Student Engineer's Triangular Scale

Terrific for engineering students, plus drafting and architecture applications. Triangular design always lays flat and triples the available scales. Fully divided, the scale is graduated in 1:10, 1:20, 1:30, 1:40, 1:50 and 1:60 per foot. Lightweight, plastic construction with clear markings printed in black. Beveled edges for clean, accurate lines. Measures 12" long.