Blade is forged with Original 1957 Mackinac bridge grating. Blade is forged with Original 1957 Mackinac bridge grating. This blade was forged in a damascus san mai pattern from the following materials: , Original Mackinac Bridge Grate steel, and 52100 core bracketed by 8 layers of 1084/15n20. All hand forged by me in my Michigan based shop.. 3-4’’ blade and 7.5-8’’ overall. Leather sheath included.