ITEM NAME:1PC 80mm X 50mm Seat Square, 90 Degree Description: 90 degrees bevel edge square True right angles for both inside and outside squares Made of stainless steel, can also work on a rainy day For checking if a surface is flat and straight Perfect for the design layout, model making, etc. Specification: Material: Stainless Steel Color: Silver Angle: Right angle (90 degrees) Long side length: Approx. 80mm/ 3.15inch Short side length: Approx. 50mm/ 1.97inch Package Includes: 1 Piece of Square Edge 90 Degree Ruler Note: Please allow 1-3mm due to manual measurement, make sure you do not mind before you.90 degrees bevel edge square. Long side length: Approx. Short side length: Approx. 1 Piece of Square Edge 90 Degree Ruler. For checking if a surface is flat and straight. Angle: Right angle (90 degrees).