Precision Designed Steel Square Section is offered in a size range of 18” or 450 mm. The Steel Square Section offers dimensional accuracy of squares on both inside and outside areas. The Square Section is made of quality grade ground steel with heavy thick stock. The Square Section has the blade hardened and ground for straightness and parallelism. Precision Designed Steel Square Section is designed in such a way that effective blade length can be measured from inner edge of the beam to end of the blade.