【 Aluminum Alloy Construction 】Crafted from lightweight aluminum alloy , this 3D mitre square offers durability . Compared to traditional wooden or plastic rulers , this woodworking tool is stronger . It maintains precision over time without warping or damage 【 Carpenter's Ruler Set 】This set includes a red carpenter's square and 2 carpenter's pencils . The woodworking tools and accessories can be used to measure dimensions , serve as marking tools , and meet precise data requirements for various tasks 【 Secure Fit 】A tight sliding fit ensures pins won't fall out of holes , providing stability and accuracy for your projects . While pins lock firmly in place , they can still be easily removed by hand for repositioning at different angles , enabling effortless drawing of precise angles 【 Precise Angles and Quick Measurements 】Engineer's square features a 6 hole design for drawing angles from 22 .5 degrees to 90 degrees . It also features preset angles at 22 .5° , 30° , 45° , 60° , 67 .5° , and 75° , each with a corresponding 1/4" corner pin hole for effortless and accurate angle marking 【 Portable and Versatile 】Measuring 79x85x112 mm / 3 .11x3 .35x4 .41 inches , this precision 3D square fits easily into your apron pocket . Ideal for DIY enthusiasts , engineers , carpenters , and decorators , it's an essential woodworking tool, Manufacturer: PATNFR