The value of an engineering ruler is inversely proportional to the number of dents along its edges. One dent on one edge is like Russian roulette, but your chances are twice as bad and the outcome is better. They are made of the same cardboard as the plotter components. I bought this ruler as a get-well present for myself one day. It says GERMANY on it. I got well.
|I know I didn't have a picture of the backside of the drafting |
board; here it is. 1.6" clearance for masking tape.