Shinwa Sokutei Square Thick 1 Shaku Same Scale on Both 10626 Ruler, Corner, Silver, (approx. 30m), Sides,

This is a carpenter's square with markings equivalent to the traditional Japanese shaku, and the markings are the same on both The thick corners help maintain perpendicularity, and when bent, the corners make contact easily. The scale markings are made of stainless steel with a low-reflection, easy-to-read silver finish. Perpendicularity: Less than 0.1 mm per 100 mm Length tolerance: ±0.2mm