Product name: Multi-functional activity combination Angle ruler Material: Aluminum alloy Foot thickness: 2.5mm Angle plate thickness: 36mm Size: 300mm: 30*8*3.6cm/11.81*3.15*1.42 inches 500mm: 50*8*3.6cm/19.69*3.15*1.42 inches Professional multi-function: professional casting combination square, support easy marking, positioning fast and accurate, simple operation. Can be used for length and depth measurement, drawing lines worry, convenient and quick, one foot multi-purpose. Flexible and adjustable: set value limit adjustment ruler, Angle valve disc in the middle of the screw limit adjustment ruler position. Using the fastening nut, the ruler can be moved freely for measurement. Multi-directional Angle: The combination Angle ruler supports 0-360° all-round rotation and fixing, Angle measurement is comprehensive, no dead Angle, and the application range is wider. The inside and outside angles can be measured and measured and plotted. Clear scale: the universal vernier Angle gauge is equipped with a metric British double scale, the use of fine technology manufacturing, high precision, clear. High quality material: Woodworking combination Angle square adopts aluminum alloy corner plate, more wear-resistant. Integrated molding, fine technology, anti-fall, strong anti-erosion ability.