Removable angle measuring auxiliary ruler, accurate angle measurement, can be used on both sides, angle measurement is more accurate Base auxiliary marking, easy to draw straight lines, thickened base auxiliary marking, draw smooth straight lines Precise positioning, angle marking, equipped with angle measuring auxiliary ruler, auxiliary marking Double-sided scale design, one side is multi-purpose, both sides are applicable, flexible to cope with various measurement scenarios High-quality and carefully aluminum alloy material, not easy to rust | strong and | anti- and anti-rust, Manufacturer: Akfldms