【Multidimensional measurement】 Professional combined square ruler made of stainless steel and aluminum alloy. Measuring range: 0-30cm. Carpentry crews can take level measurement, 90 ° angle measurement, 45 degree angle measurement, can be used as a miter, height or 45 degree gauge. 【Finely machined】 Combined square stainless steel ruler body carpenter, laser scale deepening more obvious, special treatment, anti-reflective and easy to rust. 【Fixing nut】 The square angle ruler of the angle seat has a fixing nut, which can adjust the tightness of the angle seat and the steel ruler. 【Aluminum corner seat】 High quality aluminum alloy corner seat combination angle ruler, strong corrosion resistance, durable. 【Detachable design】 Ruler seat and ruler can be used separately, powerful, easy to use, hidden marking needle. Square angle combo ruler is widely used in home, engineering, construction and other custom places and also the best choice for professional and household tools.