Basic Design: This 8-inch aluminum triangle ruler combines a 90-degree square shape with a tall vertical edge and flat base, creating a practical drawing aid for drafting and layout work.Material: Made as an aluminum triangle ruler, it offers a rigid feel and a clean engraved scale surface that supports repeated marking without relying on printed graphics.Function: As a 3D triangular ruler, it is built for straight-line marking, angle marking, and 90-degree marking, helping keep lines and corners aligned during drawing tasks.Special Features: The hollow center, slanted-side angle markings, and built-in limit post add useful reference points, making this triangle ruler easier to position and control on the page or work surface.Practical Use: Designed as a 90-degree triangle ruler, it supports accurate drafting, quick corner checks, and everyday measurement work where a stable edge and visible markings matter.
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