Features: Material: Aluminum alloy material thickening design, resistance, oxidation resistance. Exquisite workmanship, high hardness and durability. Easy to Read: Clear reading, easy to read, elegant appearance. Slide to Mark: There is no need to reverse the body when measuring, just slide to mark the right and left 45/90 degree angle. Line Ruler: Find the hole corresponding to the scale, insert the pen into the hole, and draw the desired line. High Accurate: Accurate marking t-rule helps you draws perfect horizontal lines while sliding the rule along the edge of your work. Specifications: Type: Square Protractor Material: Aluminum Alloy Color: Red, Blue Size(L*W*H): About 112x79x85mm/4.41x3.11x3.35inch Package Included: 1pc x Square Protractor