Practical Woodworking Tool: The inside and outside of the square are accurate to 90 degrees. Perfect for daily use in machinery, wood shops, and woodworking industry applications. Machinist Square Size: 80 × 50 mm (L x W); Engraved with clear dimensions and numbers that can quickly identify data, allows you to easily measure every right angle, configuration, and layout with high accuracy. Premium Material: The square measuring tool is made of high-quality carbon steel to ensure rigidity Total, the rivet connection design ensures that it is safe and secure, the surface is smooth and delicate, the touch is comfortable. Accurate Measurement: Sturdy widened base, square design, straight and stable, not easy to tip over. There will be no deviation due to movement during measurement, ensuring accurate data. Widely Uses: The machinist squares are designed with an inner notch for increased accuracy, which can accurately measure the vertical deviation of the inside and outside corners;