Multi-dimensional measurement Professional combined square ruler made of stainless steel and aluminum alloy. Measuring range: 0-30cm. Carpentry teams can make level measurements, 90 angle measurements, 45 degree angle measurements, can be used as a 45 degree miter, height or depth gauge. Finely Machined Combined square stainless steel ruler body carpenter, laser scale deepening more obvious, special treatment, anti-glare and easy to rust. Fixing nut The square corner ruler of the corner seat has a fixing nut, which can adjust the tightness of the corner seat and the steel ruler. Aluminum corner seat Corner seat combination angle ruler made of high quality aluminum alloy, strong corrosion resistance , durable. Detachable design The 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 is also the best choice for professional and home tools.