This Standard specifies dimensions and tolerances in inches and millimeters for solid steel metal cutting squaring shear knives used for shearing ferrous and non-ferrous metals. The dimensions and tolerances together with the terminology represent within the industry practice for the manufacture, assembly and use of shear knives covered in this standard. This Standard contains two separate series of shear knives, a customary unit series and a metric series. The series are hard converted and not interchangeable with the customary product.