STAINLESS STEEL MULTI PURPOSE MEASURING TOOL: Reassuringly heavy combination square made of all stainless steel, sturdy and durable rulers collection as you can feel, the graduations are engraved into the metal, clear and easy to read. DOUBLE-SIDED SCALE & PRECISE DEGREE: Built-in small levels in protractor and square tool for more accuracy. Brass nut screw for tighten or losen protractor and square tool, there are small springs in screws, so be careful to it BUILT-IN SPIRIT LEVEL: The level gauge design can help you measure more accurately . In addition to the ruler, we also have an additional center gauge and protractor, which is more practical and convenient.The multi-function ruler is suitable for a variety of measurements, such as diameter measurement and angle measurement. ADJUSTABLE GLOD NUT DESIGN:The handle adopts an arc design, which is comfortable to hold. The length of the ruler can be adjusted by turning the nut. The center gauge and protractor can be separated from the ruler, which is more convenient for carrying. ESSENTIAL HOUSEHOLD MEASUREMENT TOOLS: Good helper for engineering, woodwork, DIY, drawing design, amateur carpenter and the professionals. At the same time, it is also an indispensable measuring tool at home, you can use it to DIY wooden materials and so on.