Brand: Ozar Product Code: Ozar-ASS-0160 Product Name: Ozar Machinist Steel Squares ASS-0160 Made of finest quality ground steel with heavy thick stock. Blade is hardened and ground for straightness and parallelism. Squares are accurate both inside and outside. Sizes 18" (450 mm) and above are supplied in wooden box. Effective blade length measured from inner edge of the beam to end of the blade. Accuracy DIN 875 II (25 Micron). Size (Inch): 8 Inches Size (MM): 200 mm Color: Silver