Triangle Scale: The triangular scale is a three-dimensional shape that resembles a triangular pillar, and is a scale ruler used for design drawings. 1/20 1/25 1/50 1/75 1/100 1/150 and 1/100 1/200 1/250 1/300 1/400 1/500 [Aluminum Triangle Scale] This triangle scale is very convenient for copying down large drawings to the site. By making all the core material aluminum, it is possible to prevent warping and warping.In addition, the engraving of the scale is done by special processing, so there is no errors and is a scale scale that is accurate and easy to read.