【 Clear Scale 】The square ruler's scale is precisely calibrated , with accurate and clear lines , and it is highly scratch resistant , allowing for long lasting precision 【 Wide Applications 】This square ruler is suitable not only for the woodworking industry but also for schools , factories , and homes . It easily handles professional measurements or everyday drawing tasks . The square ruler can measure , mark lines , and angles for woodworking , construction , math measurements , handicrafts , and various other settings 【 Multi Functional Use 】This carpenter's square tool can make markings at 10° , 15° , 20° , 30° , 45° , 50° , 60° , 70° , 80° , and 90° , and features parallel line marking points , smoothly spaced at 0 .5cm / 0 .19 inches 【 Retractable Support Ledge 】The right angle ruler comes with a retractable metal ledge to help stabilize the handle on the work surface . The insertion hole makes it easy to hang on the wall , allowing convenient access and storage in any workshop 【 Sturdy Metal Construction 】Carefully made from a combination of aluminum alloy and high carbon steel , this woodworking square is strong and highly resistant to bending . It maintains its stability and accuracy even with long term use, Manufacturer: PATNFR