1、ALUMINUM ALLOY MATERIAL: Made of premium aluminum alloy, accuracy manufacturing, and accuracy scale. Easy to operate, without damaging fragile cutting edges. 2、HIGH ACCURACY MEASUREMENT: Accurate woodworking triangles with engraved inch scale markings have extremely high accuracy. The beveled edge is carved in 5 ° increments, plus 22-1/2 °, which helps to quickly measure or mark angles from 0 to 90 degrees. 3、FINE WORKMANSHIP: Woodworking square is made of 4mm thick aluminum tool board, polished to a satin surface, and anodized for durability. 4、EASY CARRYING: Small size and being lightweight as well make this ruler easy to carry to different places to use, do not take up much space. 5、WIDE APPLICATION: This triangle ruler is used for home, work shop, construction site, etc. Take for more accurate works!