Herschel Parts Drum Blade, Center Hole Size: 0.64 in, Steel, 3.78 in L, Suitable for: #B55-0358D Bolt, Kuhn GMD41, 55, 66 Disc Mower, New Holland 442, 462 Disc Mower
Edges are formed, not ground to prevent chipping or breaking
Made from the USA 10B38 (Boron) steel
Entire blade is heat-treated to a RC hardness of 45-52