Our triangle scale ruler made of solid aluminum,very solid not rust,perfect for office drawing work or school classroom study. Triangular architect's ruler features 3 sides with 6 different scales,very convenient and useful for professional. Architect ruler for laser etched,laser etched technology effectively prevents scale numbers and markings from wearing off or fading away, they will not wipe or scratch off ever. Metal rulers are good for technical, artists, architects, engineers, teachers.

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Price	$4.29	$3.89	$3.59	$3.19	$2.99	$2.49