Description: Aluminum Alloy Material90 Degree Right Angle Ruler is made of aluminum alloy, lightweight and sturdy structureSize Information90 Degree Carpenter Square Ruler measures approx 89mmx89mmx8mm/3.50inchx3.50inchx0.31inch, with hanging hole diameter 6mmProfessional ToolThis 45/90 angle ruler is designed for accurate measurements, used for both internal and external right angle detectionFunctionThis triangle ruler is used for measuring the angle of saw blade or bits, this ruler ensures no deviation in your measurementsApplicationRight Angle Ruler Measuring Tool with 45 Degree/90 Degree measuring, suitable for carpentry, construction, manual manufacturing, etc. Package Includes: 1 Right Angle Ruler Note: Please allow slightly errors 1-2cm differences due to manual measurement.