Aluminum Alloy: Crafted from sturdy yet aluminum alloy, this rafter square provides accurate and stable measurements without damaging workpiece surfaces Sturdy Base: The widened right angle base ensures stable marking and locating, allowing effortless 45° angle drawing for accurate layout work in carpentry and construction site Versatile Angle Options: This ruler features 30° 45° 60° fixed angles and multi angle hole positions, providing versatile marking solution for woodworking projects Clear Measurement Scale: The scale markings remain clearly visible over time, resisting to wear and oxidation, ensuring long lasting accuracy for all your measurement needs Wide Application: Suitable for carpenters and craft enthusiasts, this square tool performs reliably in workshop, construction site, and home projects requiring angle measurement, Manufacturer: Uxsjakjsd