Corrosion-resistant, not easy to break, durable and high hardness.each edge of the triangle ruler are polished by special process, so that it is smooth and does not hurt your hands.
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7 inch Rafter Square Aluminum Alloy Double Scale Triangle Ruler Angle Black
Corrosion-resistant, not easy to break, durable and high hardness.each edge of the triangle ruler are polished by special process, so that it is smooth and does not hurt your hands.