Features 1、The surface of the square has been carefully processed with less error and more accurate measurement. 2、The ruler body is thickened to increase the contact area with the measuring object, and the measurement is more stable. 3、The knife‑edge square is made of stainless steel, anti‑rust and anti‑corrosion, and can be used in different environments. 4、Adopt one‑piece structure processing, with high accuracy and high quality, and longer service life. 5、There are milled grooves in the inner corners to remove burrs and debris and make the measurement surface cleaner. Specification Item Type: Knife Edge Ruler Material: Stainless steel Product Size (L x W): Approx. 80 x 50mm / 3.1 x 2in Thickness: Approx. 5mm / 0.2in Purpose: Suitable for detecting angles and marking on parts Package List 1 x Knife Edge Ruler