【High Quality】The ruler is made of high quality stainless steel. The angle bracket is made of aluminum alloy with brass locking screws, which are sturdy and durable and will never rust or corrode, and are not easy to deform. 【Multi-Angle Measurement】This combination square consists of a 300mm ruler and an adjustable square head. Suitable for 45/90 degree angle markings, multi-dimensional measurement, marking straight lines, and drawing parallel lines. Our combination square best meets your different requirements. 【Separate Design】The ruler base and ruler can be used separately with hidden markers. Save a lot of measuring tools, make the workbench clean and tidy, and use it very easily 【It's a perfect helper for DIY】Woodworking. Great tools for carpenter to mark perfect horizontal lines as they slide along the edge of their work. This saves time and improves efficiency. Rendcqin Zinc Alloy Combination Square Ruler This combination square ruler is suitable for transferring dimensions,