Square wide edge shape 90 degree angle blade ruler measuring tool

features: 1. Designed for precise layout and measurement 2. The shape of a square has right angles inside and outside. 3. The beam and blade are parallel to the ground. four 4. 4. The length of the blade is measured from the corner of the beam to the end of the blade. Specifications. Material: carbon steel Size: 63 × 40mm，80 × 50mm，100 × 63mm，125 × 80mm，160 × 100mm，200 × 125mm use. For measuring right angles be careful: Due to different displays and lighting effects the actual color of the item may be slightly different from the color on the picture. Thank you. Due to manual measurement please allow 1-3 cm measurement deviation. Package includes 1 * Square